Ce Unit 2 Practice Test

Front

What is the group number for non-reactive elements on the periodic table?

Back

18

Front

What is the average atomic mass of silicon?

Back

28.09

Front

What happens to atomic numbers as you move from left to right on the periodic table?

Back

They increase.

Front

Which element is located in period 4 of the periodic table?

Back

Iron (Fe)

Front

What is the atomic mass of an element with 16 protons, 13 neutrons, and 16 electrons?

Back

29 amu

Front

Define atomic mass.

Back

The weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is the significance of the atomic number?

Back

It represents the number of protons in an atom and determines the element's identity.

Front

What are periods in the periodic table?

Back

Horizontal rows that indicate the number of electron shells in the elements.

Front

What are groups in the periodic table?

Back

Vertical columns that group elements with similar chemical properties.

Front

What is a neutron?

Back

A subatomic particle found in the nucleus of an atom, with no electric charge.