Atoms & Molecules

Atoms have a small dense core called the ---.

• nuclei

• nucleus

• atomic mass

• atomic number

The nucleus consists of ---

• protons

• neutrons

• electrons

• isotopes

--- orbit the nucleus.

• protons

• neutrons

• electrons

• isotopes

contain a negative charge

• protons

• neutrons

• electrons

• molecules

Tags

NGSS.MS-PS2-3

contain a positive charge

• protons

• neutrons

• electrons

• molecules

units for measuring mass

• joules

• grams

• AMU

• watts

• kilograms

The mass of an atom is calculated by adding the mass of the following

• protons

• neutrons

• electrons

• molecules

The atomic number of an atom is determined by the number of --- in the atom.

• protons

• neutrons

• electrons

When a substance is made up of only one type of atom, it is called a(n)

• molecule

• compound

• element

• isotope

When atoms join together chemically, they form a ---.

• molecule

• compound

• isotope

• element

Tags

NGSS.MS-PS1-1