Science Study Guide for the Final Exam, Spring 2024

A substance that is not mixed with any other substance is called a(n)...

• compound

• pure substance

• molecule

• element

The two types of pure substances are...

(choose 2)

• molecules

• mixtures

• compounds

• elements

Atoms of the same element have the same number of _.

Almost all atoms are...

• liquid

• nonmetals

• bonded to other atoms

• gasses

The two types of bonds that can hold atoms together are...

(choose 2)

• covalent

• pure

• ionic

• molecular

When two atoms share electrons, this is called a(n) _ bond.

• compound

• pure

• ionic

• covalent

If one atom pulls one or more electrons off another atom, and you end up with one negatively charged atom and one positively charged atom, the attraction between them is called a(n) _ bond.

• compound

• pure

• ionic

• covalent

Tags

NGSS.MS-PS2-3

Each element on the periodic table is represented by one a one or two-letter _.

• chemical symbol

• chemical compound

• chemical formula

• chemical reaction

An element’s atomic number represents how many _ are in the nucleus of each of its atoms.

• photons

• protons

• electrons

• neutrons

Gallium's chemical symbol is _.

• 31

• 69.723

• Ga

• G

Tags

NGSS.MS-PS1-1