What occurs as the atomic number of the elements in Period 2 increases?
1)The nuclear charge of each successive atom decreases, and the atomic radius decreases.
2)The nuclear charge of each successive atom decreases, and the atomic radius increases.
3)The nuclear charge of each successive atom increases, and the atomic radius decreases
4)The nuclear charge of each successive atom increases, and the atomic radius increases.

Answers

Answer 1

Answer:

3)The nuclear charge of each successive atom increases, and the atomic radius decreases

Explanation:

As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.


Related Questions

what is 4.9 + 3.822 is sig fig?

Answers

Answer: 4.9 + 3.822 = 8.7

Explanation: Hope this helps

Answer: 8.722

Explanation:

molar mass for NiI2

Please help

Answers

Answer:

312.50234

...............

Molar mass of NiI2 is 312.50234 ± 0.00046 g/mol

Answer:

312.502 g/mol. GOOD LESSONS

calculate the number of atom of each element : ​

Answers

Answer:

P = 6

O = 15

Explanation:

for the phosphorus you multiply the mole number which number of atom present, same thing applicable to the oxygen atom

Predict the products of the following reaction: Zn(ClO₃)₂ (aq) + K₃PO₄ (aq)

Answers

The products : Zn₃(PO₄)₂ (s) + KClO₃ (aq)

Further explanation

Given

reaction: Zn(ClO₃)₂ (aq) + K₃PO₄ (aq)

Required

The products

Solution

Double-Replacement reactions :  an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product

General formula :

AB + CD ⇒ AD + CB

One of the characteristics of the double replacement reaction is the presence of precipitated compounds

Zn(ClO₃)₂ (aq) + K₃PO₄ (aq) ⇒ Zn₃(PO₄)₂ (s) + KClO₃ (aq)

Zn₃(PO₄)₂ (s)⇒ precipitated compounds, so that this reaction can occur

Of the following substances, ________ has the highest boiling point. Of the following substances, ________ has the highest boiling point. Kr Cl2 BH3 CH4 PCl3

Answers

Answer:

Of the following substances, PCl₃ has the highest boiling point

Explanation:

The given substances and their boiling point from online resources are;

Krypton, Kr, boiling point = -153.4°C

Chlorine gas, Cl₂, boiling point = -34.6°C

Borane, BH₃, (transient compound), boiling point of the dimer it forms B₂H₆ = -164.85°C

Methane, CH₄, boiling point = -161.6°C

Phosphorus trichloride, PCl₃, boiling point = 76.1°C

Therefore, given that PCl₃ is a volatile liquid at room temperature, while the other substances are gases and that PCl₃ has the highest boiling point of all the substances of 76.1°C, the substance with the highest boiling point is PCl₃.

Explain the van der Waal's
pressure and volume correction in an ideal gas equation​

Answers

Answer:

The pressure correction in the ideal gas equation accounts for the intermolecular attractive forces between gas molecules. Vanderwaal constant 'a' measures the magnitude of intermolecular attractive forces between the particles.  

Thevolume correction to the total volume per mole occupied by gas molecules, it closely corresponds to the volume per mole of the liquid state, whose molecules are closely layered. Vanderwaal constant 'b' measures the volume excluded by a mole of particles.

Vander waals equation followed by real gas is:

[tex](P+\frac{an^2}{V^2})(V-nb)=nRT[/tex]

where,

P = pressure of gas

V = volume of gas

n = number of moles of gas

R = gas constant

T = temperature of gas

Conduction is when heat is transferred through
A. the sun
B. the air
C. the object
D. the motion

Answers

The correct answer is a the sun
it is a.) the sun because it’s heat

All matter is involved in motion of some kind. True or false

Answers

Answer:

true

Explanation: all matter down to the molecular or even atomic level has a constant vibration and movement. The only time that any matter could stop moving would be at absolute zero.

1 mole is = how many grams of copper?​

Answers

Answer:

63.55 g

Explanation:

The relation between molecular (formula) mass and molar mass Page 4 4 • To obtain one mole of copper atoms (6.02 x 1023 atoms), weigh out 63.55 g copper. The molar mass (M) of a substance is the mass of one mole of entities (atoms, molecules, or formula units) of the substance.

Answer:

63.55 Grams.

Explanation:

why elements are arranged according to atomic number rather than atomic mass in the periodic table

Answers

Assuming there were errors in atomic masses, Mendeleev placed certain elements not in order of increasing atomic mass so that they could fit into the proper groups (similar elements have similar properties) of his periodic table.

How long will it take you to walk 12 km if your speed is 2.5 km/hr?

Answers

Explanation:  Walking for 30 minutes covers a distance of 2.0 to 2.5 km and burns about 125 calories

Answer:

4.8 hours

Explanation:

12÷2.5= 4.8 hours

Which of the following elements has the highest electronegativity?
O A. Rubidium (RD)
B. Calcium (Ca)
C. Silicon (Si)
O D. Nitrogen (N)

Answers

Answer:

I got fluorine for my guess

Explanation:

Answer:

It's D Nitrogen with 3.04

(HELP PLEASE )A solid is being cooled down.
What is happening to the particles of the solid?

Answers

Answer:  the vibration becomes faster

Explanation:

How many moles of sodium hydroxide are required to react completely with 23.1 moles of sulfuric acid?
H2SO4(aq) + 2NaOH(aq) = 2H2O(l) + Na2SO4(aq)
Select one:
a) 46.2 moles NaOH
b) 11.6 moles NaOH
c)5.78 moles NaOH
d)23.1 moles NaOH

Answers

Explanation:

Mole ratio of H2SO4 to NaOH = 1 : 2.

Moles of NaOH

= Moles of H2SO4 * (2/1)

= 23.1mol * (2/1)

= 46.2mol. (A)

A 1.25 g sample of aluminum is reacted with 3.28 g of copper (II) sulfate. What is the limiting reactant?
2Al(s) + 3CuSO4(aq) = Al2(SO4)3(aq) + 3Cu(s)
Select one:
a)Copper
b)Aluminum sulfate
c)Aluminum
d)Copper (II) sulfate

Answers

Answer:

d. Copper (II) sulfate

Explanation:

Given data:

Mass of Al = 1.25 g

Mass of CuSO₄ = 3.28 g

What is limiting reactant = ?

Solution:

Chemical equation:

2Al + 3CuSO₄   →   Al₂ (SO₄)₃ + 3Cu

Number of moles of Al:

Number of moles = mass/molar mass

Number of moles = 1.25 g/ 27 g/mol

Number of moles = 0.05 mol

Number of moles of CuSO₄:

Number of moles = mass/molar mass

Number of moles = 3.28 g/ 159.6 g/mol

Number of moles = 0.02 mol

now we will compare the moles of reactant with product.

              Al           :           Al₂ (SO₄)₃

                2          :             1

              0.05       :          1/2×0.05=0.025 mol

               Al           :            Cu

                2            :              3

              0.05         :            3/2×0.05 = 0.075 mol

        CuSO₄           :           Al₂ (SO₄)₃

               3             :             1

              0.02         :          1/3×0.02=0.007 mol

        CuSO₄           :            Cu

              3               :              3

              0.02         :              0.02  

Less number of moles of reactants are produced by CuSO₄ thus it will act as limiting reactant.

What is the density of a block of wood that has a mass of 11 g and a volume of 27 cm3?

Answers

The explanation is in the picture

Answer:0.407

Explanation:

what is rtp in chemistry?​

Answers

RTP stands for Room Temperature and Pressure.

One mole of any gas has a volume of 24 dm 3 or 24,000 cm 3 at rtp (room temperature and pressure). This volume is called the molar volume of a gas. This equation shows how the volume of gas in dm 3 at rtp is related to the number of moles: volume of gas at rtp = number of moles × 24.

Hope this helped!

*ANSWERED*
Which statements describe the Rutherford atomic model? Check all that apply.
It defined the nucleus for the first time.
Electrons exist only in energy levels.
Electrons orbit the nucleus.
Electrons exist in any location in the atom.

THE ANSWER IS A & D!!!

Answers

Answer:

-A.

-D.

Explanation:

-It defined the nucleus for the first time. √

-Electrons exist only in energy levels. ×

-Electrons orbit the nucleus. ×

-Electrons exist in any location in the atom. √

----------------------------------------------------------------------------------------------------------------

Physicist Ernest Rutherford envisioned the atom as a miniature solar system, with electrons orbiting around a massive nucleus, and as mostly empty space, with the nucleus occupying only a very small part of the atom. The Rutherford model was devised by the New Zealand-born physicist Ernest Rutherford to describe an atom. Rutherford directed the Geiger–Marsden experiment in 1909, which suggested, upon Rutherford's 1911 analysis, that J. J. Thomson's plum pudding model of the atom was incorrect.

----------------------------------------------------------------------------------------------------------------

Brainliest?

:D

Ty!

Answer:

A and D

Explanation:

I am doing this so other guy gets brainliest. He earned it

What would increase the amount of your carbon dioxide output?

Answers

Answer:

Consuming electricity: Burning fossil fuels emits CO2, with coal releasing twice as much of the gas as petroleum. Worldwide, fossil fuels generate 85 percent of electricity. The number of coal-burning plants will increase as China and India continue to industrialize.

Which power source directs the electrons from oxidation-reduction reactions to flow through a device to give the device power? O A. An electric motor B. A battery C. An electromagnet O D. An electric generator​

Answers

Answer:

B. A battery.

Explanation:

I just took the test

The outer energy level of a noble gas is

Select one:
a. empty.
b. filled.
c. half-filled.

Answers

I believe the answer would be B

What is the purpose of light energy?

Answers

The sun gives off light energy to help plants photosynthesize and make food

MULTIPLE CHOICE
This equation represents an unbalanced chemical reaction:
Nal + Cl2 → NaCl + 12
When the equation is balanced, which coefficient should be placed before NaCl?

Answers

Answer:

C 2

Explanation:

2Nal + Cl2 → 2NaCl + I2

This is balanced equation

which represents a linear graph?

Answers

Answer:

The 2nd one

Explanation:

What do you mean by ductility?​

Answers

Ductility is the ability of a material to be remoulded to a force applied to it without breaking.

e.g copper electronic wires


What is the first answer ?

Answers

Answer:

d....

Explanation:

yes its d

sorry

How is the percent composition by mass determined?

Answers

The percent composition depicts the percent of an individual element by mass. The percent composition by mass is determined by the ratio of individual mass to the molar mass of the whole compound.

What is mass percent composition?

Mass percent composition is defined as the ratio of the mass of an element in a mole to the molar mass of a compound and multiplied by 100. This allows knowing the mass of an element in a compound or a molecule to the rest of the compound.

First, the molar mass of the whole compound is calculated by adding the individual masses and then used in an equation to get divided by the individual mass of the involved element.

The mass percent composition is given as,

% by mass = mass of element / molar mass of compound × 100%

Therefore, the mass percent composition involves the mass of the individual elements and molar mass.

Learn more about mass percent composition here:

https://brainly.com/question/14580499

#SPJ2

How is the filter bed cleaned

Answers

Answer:

The filter bed is cleaned by occasional backwashing ;-; im sorry if this isn't a great answer but I tried

Examine the molecules. H2O HCl HF What do all three molecules have in common?
All of the molecules are nonpolar compounds.
All of the molecules contain an alkaline earth metal.
All of the molecules are polar covalent compounds.
All of the molecules are diatomic.

Answers

Answer:

polar

Explanation:

because interaction between them is hydrogen bonds

Which of the following options correctly ranks solid iodine, liquid bromine, and chlorine gas in order of increasing intermolecular force strength?
A solid iodine B. solid iodine < chlorine gas C. chlorine gas o
D. liquid bromine < solid iodine

Answers

Answer:

solid iodine chlorine gas

The correct order for ranking solid iodine, liquid bromine, and chlorine gas in order of increasing intermolecular force strength is;  chlorine gas < liquid bromine < solid iodine.

Intermolecular forces are forces that hold substances together in a particular state of matter. Intermolecular forces increase in the order; gases < liquids < solids. Solids have the highest magnitude of intermolecular interaction between particles.

Bearing this in mind, the correct order for ranking solid iodine, liquid bromine, and chlorine gas in order of increasing intermolecular force strength is;  chlorine gas < liquid bromine < solid iodine.

Learn more: https://brainly.com/question/9328418

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