Flashcard 1 - Unit 2

Front

What is a valence electron?

Back

Electrons in the outer shell of an atom that are involved in chemical bonding.

Front

How many electrons can fit on the 1st energy level (orbital) for any Bohr Model?

Back

2 electrons.

Front

How many valence electrons does iodine have?

Back

7 valence electrons.

Front

What is the atomic symbol for sodium?

Back

Na.

Front

What are the rows on the periodic table called?

Back

Periods.

Front

What are the columns on the periodic table called?

Back

Groups.

Front

What is the maximum number of electrons in the 2nd energy level?

Back

8 electrons.

Front

What is the significance of valence electrons in chemical reactions?

Back

They determine how an atom can bond with other atoms.

Front

Which group of the periodic table contains the noble gases?

Back

Group 18.

Front

What is the electron configuration for sodium?

Back

1s² 2s² 2p⁶ 3s¹.