Final Exam Practice

Front

What element is located in Group 18 & Period 5?

Back

Xenon is located in Group 18 and Period 5 of the periodic table.

Front

How many atoms of carbon are in 2C2H6?

Back

There are 4 atoms of carbon in 2C2H6.

Front

What Group is Magnesium in?

Back

Magnesium is in Group 2 of the periodic table.

Front

How many atoms are there TOTAL in H2SO4?

Back

There are 7 total atoms in H2SO4.

Front

What is the atomic number for Antimony?

Back

The atomic number for Antimony is 51.

Front

What is the definition of a chemical element?

Back

A chemical element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is the significance of the atomic number?

Back

The atomic number represents the number of protons in the nucleus of an atom and determines the element's identity.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What is the formula for calculating the total number of atoms in a compound?

Back

The total number of atoms is the sum of the subscripts in the chemical formula.

Front

What does the term 'period' refer to in the periodic table?

Back

A period refers to a horizontal row in the periodic table, indicating the energy level of the electrons.