What is a substance that cannot be broken down into similar chemical substances?

• Element

• Compound

• Molecule

• Mixture

What is at the center of every atom?

• An electron

• A compound

• A molecule

• A nucleus

Tags

NGSS.MS-PS1-1

Which two particles make up the nucleus of an atom?

• Protons and Electrons
• Protons and Neutrons
• Molecules and Compounds
• Neutrons and Electrons

Tags

NGSS.HS-PS1-8

Which of the following determines the type of element that an atom makes?

• The size of the nucleus.
• The number of protons.
• How much the atom weighs.
• The number of neutrons.

A proton is a _____ charged particle.

• Negatively

• Positively

• Neutrally

What charge does a neutron have?

• positive

• negative

• no charge

Changing this causes ions to form

• electrons
• protons
• neutrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The atomic number tells us the number of ____________?

• Neutrons
• Protons
• Electrons

The atomic mass is the ______________ + ____________ in the atom.

• neutrons + electrons
• protons + electrons
• protons + neutrons
• electrons

What is the chemical symbol for the element Carbon

• Ca

• CO2

• C
• Cd