Basic Chemistry

Which of the following describes what an atom is? Click all that apply.

• Atoms are the building block of the physical world

• Atoms are the smallest unit of matter

• Atoms cannot be broken down further without losing their properties

• An atom's nucleus (core) is made up of electrons.

Which of the following are found in the atomic nucleus? Click all that apply.

• electron

• proton

• neutron

Which subatomic particle moves quickly around the atomic nucleus in various energy levels?

• electrons

• protons

• neutrons

Which of the following subatomic particles are negatively charged?

• electrons

• protons

• neutrons

Which of the following subatomic particles are positively charged? Click all that apply.

• electrons

• protons

• neutrons

True or False. Neutrons are neutrally charged (have no charge).

• True

• False

Tags

NGSS.MS-PS1-1

The atomic number refers to how many _____ an atom has.

• electrons

• protons

• neutrons

Elements are substances that contain the same type of _____.

Isotopes are a form of an element that has the same number of protons but differing numbers of _______.

• electrons

• neutrons

• energy shells

• valence shell electrons

Tags

NGSS.HS-PS1-8

Atoms are only stable when they have _____ electrons in their outer (valence) shell.

• 6

• 7

• 8

• 12