Hydrogen sometimes is missing an electron and sometimes it has an extra electron.
Helium (He) and hydrogen (H) are unique elements. Hydrogen has the abilities and electrons of two groups, one and seven, and occasionally has more electrons than it does.
What are electrons?Electrons are defined as a subatomic particle with a negative charge that makes up the nucleus of an atom along with protons and neutrons. For scientists, it can be challenging to monitor them because of how quickly they spin. The tiniest particles in an atom, you can put 2000 of them into a proton, they are drawn to the positive charge of the protons.
Because it has no neutrons in its nucleus, hydrogen (particularly hydrogen -1) is unusual. There is only one proton in the nucleus of hydrogen. The only element without neutrons is this one. Although it has a single electron orbiting its nucleus as well, hydrogen typically contributes this electron to form a single, positively charged proton instead.
Thus, Helium (He) and hydrogen (H) are unique elements. Hydrogen has the abilities and electrons of two groups, one and seven, and occasionally has more electrons than it does.
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What is the first answer ?
Answer:
d....
Explanation:
yes its d
sorry
Alkali metals are extremely reactive because they
1. have very small atomic masses
2. are not solid at room temperature
3. have one valence electron that is easily removed to form a positive ion
4. have two valence electrons that form compounds with calcium and magnesium
Answer:
1 is the answer of these questions
Alkali metals are extremely reactive because they 3. have one valence electron that is easily removed to form a positive ion
Why are alkali metals so reactive ?The alkali metals are the elements in group 1 of the periodic table. They are lithium, sodium, potassium, rubidium, cesium, and francium. These elements are all very reactive because they have one valence electron that is easily removed to form a positive ion.
The valence electron is the electron that is furthest away from the nucleus of the atom. It is also the electron that is involved in chemical bonding. The alkali metals have a very low ionization energy, which means that it does not take much energy to remove the valence electron.
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what is 4.9 + 3.822 is sig fig?
Answer: 4.9 + 3.822 = 8.7
Explanation: Hope this helps
Answer: 8.722
Explanation:
How many grams do you have in: 5.3 moles of Zr(NO3)4
Answer:
1800 g Zr(NO₃)₄
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
5.3 mol Zr(NO₃)₄
Step 2: Identify Conversions
Molar Mass of Zr - 91.22 g/mol
Molar Mass of N - 14.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of Zr(NO₃)₄ - 91.22 + 4(14.01) + 12(16.00) = 338.26 g/mol
Step 3: Convert
[tex]5.3 \ mol \ Zr(NO_3)_4(\frac{339.26 \ g\ Zr(NO_3)_4}{1 \ mol \ Zr(NO_3)_4} )[/tex] = 1798.08 g Zr(NO₃)₄
Step 4: Check
We are given 2 sig figs. Follow sig fig rules and round.
1798.08 g Zr(NO₃)₄ ≈ 1800 g Zr(NO₃)₄
what is the state of matter shown in this figure?
Water has a density of 1g/cm3. Describe an investigation that could test whether a material has a density less than, greater than, or equal to water and identify the independent and dependent variable in your investigation. Also, identify your hypothesis.
Answer:
You can test whether or not the object is more or less dense than what by having, “80mL” (as long as the amount of water is easy to read and doesn’t overflow). You take all the object you want to test for, slowly and carefully drop the object into the water. If the Object sinks it is more dese and if it floats it is less dense. To find the exact density of the tested objects look at how much water is being displaced in the container and subtract the amount of water from that to get volume. Then, (or before putting the object into water) weight the object to find its mass. Next you divide the mass in mL by the volume to get the exact density.
Explanation:
please help. thank you!
Find an interesting chemical reaction. It can be a simple one but please have some facts and info about it. Thank you!
Answer:
Mercury chemical bond with aluminum, AKA aluminum amalgam
Explanation:
After the protective oxide layer on aluminum is broken, if mercury were to come into contact with it, then the aluminum will bond with the mercury and will create this interesting tower looking thing upwards. You can learn more about this by searching up Aluminium amalgam, where there is plenty of info about it.
Conduction is when heat is transferred through
A. the sun
B. the air
C. the object
D. the motion
Given the unbalanced equation showing the reactants and product of a reaction occurring at 298 K and 100. kPa:
____P4(s) + ____Cl2(g) ____PCl3(l) + energy
Balance the equation below for the reaction, using the smallest whole number coefficients.
____P4(s) + ____Cl2(g) ____PCl3(l) + energy
Balanced equation
P4(s) +6Cl2(g) ⇒4PCl3(l) + energy
Further explanationGiven
Reaction(unbalnced)
P4(s) +Cl2(g) ⇒PCl3(l) + energy
Required
Balanced equation
Solution
Give a coefficientaP4(s) +bCl2(g) ⇒PCl3(l) + energy
Make an equationP, left=4a, right=1⇒4a=1⇒a=1/4
Cl, left=2b, right=3⇒2b=3⇒b=3/2
The equation becomes:
1/4P4(s) +3/2Cl2(g) ⇒PCl3(l) + energy x 4
P4(s) +6Cl2(g) ⇒4PCl3(l) + energy
why do people save money in bank
Explanation:people save money in the bank because there is no fear of theft and robbery ans also we can get interest from the bank which is profit for us.
Answer:
People save money in bank to save robbery from the people .
The element in Group 4, Period 3 of the periodic table is classified as a
Answer:
if you mean group 4a then it is a metalliod
Explanation:
molar mass for NiI2
Please help
Answer:
312.50234
...............
Molar mass of NiI2 is 312.50234 ± 0.00046 g/mol
Answer:
312.502 g/mol. GOOD LESSONS♡
Of the following substances, ________ has the highest boiling point. Of the following substances, ________ has the highest boiling point. Kr Cl2 BH3 CH4 PCl3
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.
What is the percentage of chlorine in NaCl?
Answer:
60.66 %
Explanation:
The mass percentage of chlorine is 60.66 % chlorine in the compound sodium chloride. To calculate this, add together the mass of one mole of sodium
Which option gives an object's volume in SI units
The SI unit of volume is the cubic meter.
What is the purpose of light energy?
Write two ways to reduce carbon dioxide in atmosphere which result to global warming.
Answer:
1- Using buses rather than opting for cars.
2- Regularly servicing your cars.
Explanation:
calculate the number of atom of each element :
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
Burning of paper is chemical change why? write with reaction.
Answer:
Burning of paper is not a physical change.It is chemical change as ash is formed in the process which is new compound and oxides of carbon are also released during the process!
what is rtp in chemistry?
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!
why elements are arranged according to atomic number rather than atomic mass in the periodic table
How long will it take you to walk 12 km if your speed is 2.5 km/hr?
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
How is the percent composition by mass determined?
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.
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What is the density of a block of wood that has a mass of 11 g and a volume of 27 cm3?
Answer:0.407
Explanation:
How is the filter bed cleaned
Answer:
The filter bed is cleaned by occasional backwashing ;-; im sorry if this isn't a great answer but I tried
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
Answer:
B. A battery.
Explanation:
I just took the test
Why would a scientist want to replicate another scientist's experiment?
Answer:
See the answer below
Explanation:
A scientist B might want to replicate the experiment of another scientist A in order to assess the claims made by scientist A. In other words, replication of the experiment of another scientist is done to see if a similar outcome would be arrived at or there would be variations.
The claims made by a scientist while reporting the outcome of a particular experiment must be reproducible by another scientist under similar conditions. Otherwise, the claims are said to be false.
HELPPPPPPPPPP ME PLLSS LINK BELOW!!!
Answer:
B hotplate beakers thermometers
Explanation:
Answer:yea im going to go with A
Explanation:
A collection of standards that define proper social behavior in a specific community is called
confidentiality.
etiquette.
teamwork.
self-discipline.
_______ is a physical property
A: Oxidation
B: Flammability
C: Density
D: Combustibility
Answer:
C. Density
all the others are chemical properties
Answer:
C: Density
Explanation: