Unit 2 Test REVIEW

Front

What is the position of an element in the periodic table if its electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁵?

Back

Group 17

Front

What happens to energy as an atom goes from ground state to excited state?

Back

It increases

Front

Which electron configuration belongs to Chlorine (Cl)?

Back

1s² 2s² 2p⁶ 3s² 3p⁵

Front

How many neutrons are in the following symbol? (Assuming the symbol has a mass number of 15 and atomic number of 7)

Back

8

Front

How many valence electrons should Lithium have in its Lewis dot model?

Back

1

Front

What is the definition of valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

What is the significance of the periodic table's groups?

Back

Elements in the same group have similar chemical properties and the same number of valence electrons.

Front

What is the ground state of an atom?

Back

The ground state is the lowest energy state of an atom, where electrons are in the closest orbitals to the nucleus.

Front

What is an excited state of an atom?

Back

An excited state occurs when an atom absorbs energy and one or more electrons move to a higher energy level.

Front

How do you determine the number of protons in an atom?

Back

The number of protons is equal to the atomic number of the element.