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Ainat [17]
3 years ago
10

How can the periodic table be used to infer the number of valence electrons in an atom?

Chemistry
1 answer:
Radda [10]3 years ago
8 0
Beside each element on the right upper side is the number of electrons in each energy level starting from the first energy level to the last going in order from top to bottom, the number of valence electrons would be the last one.
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2 years ago
a gas has a volume of 350 cubic centimeters at 740 mmHg. how many cubic centimeters will the gas occupy at a pressure of 900 mmH
Harrizon [31]

Answer: 287.8 cm3

Explanation:

Given that:

Initial volume of gas V1 = 350 cm3

Initial pressure of gas P1 = 740 mmHg

New volume V2 = ?

New pressure P2 = 900 mmHg

Since, pressure and volume are involved while temperature is constant, apply the formula for Boyle's law

P1V1 = P2V2

740 mmHg x 350 cm3 = 900mmHg x V2

V2 = (740 mmHg x 350 cm3) /900mmHg

V2 = 259000 mmHg cm3 / 900mmHg

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V ∝ n  

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V ∝ n

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