Chemistry 1st Semester Review

Front

What is the mass number of an atom?

Back

The mass number is the sum of the protons and neutrons in an atom.

Front

What type of ions do elements on the LEFT side of the periodic table most likely form?

Back

Elements on the LEFT side of the periodic table most likely form positive ions.

Front

Convert 0.052 to scientific notation.

Back

Front

What type of elements are located to the right of the zig-zag line on the periodic table?

Back

The elements to the right of the zig-zag line are nonmetals.

Front

What are the particles in an atom that carry a negative charge?

Back

The particles in an atom that are negative are electrons.

Front

Define atomic number.

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the difference between metals and nonmetals?

Back

Metals are typically shiny, conductive, and malleable, while nonmetals are dull, insulative, and brittle.

Front

What is a molecule?

Back

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

Front

What is the role of neutrons in an atom?

Back

Neutrons help stabilize the nucleus of an atom and contribute to the mass number.

Front

How do you determine the number of electrons in a neutral atom?

Back

In a neutral atom, the number of electrons equals the number of protons.