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Zarrin [17]
2 years ago
7

What is the group of elements with the same number of valence electrons?

Chemistry
1 answer:
Leya [2.2K]2 years ago
7 0

Answer:

All groups have the same number of valence electrons.

Explanation:

groups are the columns.

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Pure air is a mixture of several gases that are invisible and odorless. Consists of 78% nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide.  
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3 years ago
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1) The temperature inside my refrigerator is about 40 Celsius. If I place a balloon in my fridge that initially has a temperatur
viva [34]

Answer:  The volume of the balloon when it is fully cooled by my refrigerator is 0.3 L

Explanation:

To calculate the final volume of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

\frac{V_1}{T_1}=\frac{V_2}{T_2}

where,

V_1\text{ and }T_1 are the initial volume and temperature of the gas.

V_2\text{ and }T_2 are the final volume and temperature of the gas.

We are given:

V_1=0.5L\\T_1=220^oC=(220+273)K=493K\\V_2=?\\T_2=40^oC=(40+273)K=313K

Putting values in above equation, we get:

\frac{0.5}{493}=\frac{V_2}{313}\\\\V_2=0.3

Thus the volume of the balloon when it is fully cooled by my refrigerator is 0.3 L

4 0
3 years ago
A student was asked to name an element that reacts like chlorine (Cl). Which element should the student name?
kramer

Answer:

Bromine (BR2)

Explanation:

Cl2 + Br2 = ClBr

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The range in size of most atomic radii is approximately _____.5 × 10−11 m to 2 × 10−10 m2 to 5 nm5 × 10−21 m to 2 × 10−20 m2 to
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Please help,due in one hour I only need the number of atoms of each element <br>​
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Answer:

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Sodium (Na), chemical element of the alkali metal group (Group 1 [Ia]) of the periodic table. Sodium is a very soft silvery-white metal.

Sodium is a chemical element with the symbol Na (from Latin "natrium") and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23Na.

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Carbon monoxide (Co)        

Carbon monoxide is a colorless, odorless gas. Prolonged exposure to carbon monoxide rich atmospheres may be fatal. It is easily ignited. It is just lighter than air and a flame can flash back to the source of leak very easily. Under prolonged exposure to fire or intense heat the containers may violently rupture and rocket.

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Aluminium hydroxide, Al(OH)₃, is found in nature as the mineral gibbsite and its three much rarer polymorphs: bayerite, doyleite, and nordstrandite. Aluminium hydroxide is amphoteric in nature, i.e., it has both basic and acidic properties. 1 atom.

Hope this is what you are looking for!

Explanation:

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