Atoms and molecules

Which two particles contribute more to the mass of an atom? (select 2)

• Protons

• Neutrons

• Electrons

• Nucleus

What is at the center of every atom?

• An electron
• A compound
• A molecule
• A nucleus

Tags

NGSS.HS-PS1-8

The positively charged particles of an atom are the ________.

• electrons
• protons
• neutrons
• protons & neutrons

Tags

NGSS.MS-PS1-1

What does the nucleus of an atom contain?

• Electrons and neutrons
• Protons and neutrons
• Neutrinos and positrons
• DNA and RN

Tags

NGSS.MS-PS1-1

What happens if an atom has more electrons than protons

• It will have a positive charge

• It will have a negative charge

• It will be neutral

• Number of electrons and number of protons always are the same

How do we call the atoms that have different number of electrons and protons?

• Isotopes

• Ions

• Neutral

• Leptons

This atom has more electrons than protons

• True

• False

Tags

NGSS.MS-PS1-1

Atoms are made up of ________________

• energy

• electrons

• subatomic particles

• gasses

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

__________ are negatively charged particles that are in the orbitals around the nucleus.

• protons

• nucleus

• neutrons

• electrons

Tags

NGSS.MS-PS1-1

A proton has a ___________ charge.

• positive

• negative

• neutral

• massive.

Tags

NGSS.MS-PS1-1