Unit 3 Test Review - Electrons & Periodic Table (23-24)

Front

What is the atomic number of Nitrogen?

Back

7

Front

How many protons are in a Chlorine atom?

Back

17

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine how an atom can bond with other atoms.

Front

What trend is observed in atomic radius as you move down a group in the periodic table?

Back

Atomic radius increases as you move down a group due to the addition of electron shells.

Front

What is the electron configuration of Phosphorus?

Back

1s² 2s² 2p⁶ 3s² 3p³

Front

Which group in the periodic table contains noble gases?

Back

Group 18.

Front

What is the relationship between the number of protons and the size of an atom?

Back

As the number of protons increases, the positive charge pulls electrons closer, making the atom smaller.

Front

How many valence electrons does an element in Group 15 have?

Back

5

Front

What is the atomic radius of Radon compared to other noble gases?

Back

Radon has the largest atomic radius among the noble gases.

Front

What is the general trend in ionization energy as you move across a period?

Back

Ionization energy increases as you move from left to right across a period.