Atoms, Protons, Neutrons

What is at the center of every atom?

• An electron

• A compound

• A molecule

• A nucleus

Which two particles make up the nucleus of an atom?

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

What is the role of an electron in an atom?

• Electrons live inside the nucleus and carry a neutral charge.
• Electrons circle the nucleus and have a positive charge.
• Electrons circle the nucleus and have a negative charge.
• Electrons live inside the nucleus and have a negative charge.

Tags

NGSS.MS-PS2-3

In an atom, what is the number of protons equal to?

• The number of electrons.
• The number of neutrons.
• The number of molecules.
• The number of nuclei.

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.

What forms when two atoms combine?

• A molecule.
• A nucleus.
• A proton.
• An electron.

Tags

NGSS.MS-PS1-1

What is a compound?

• The center of an atom that is formed by neutrons, protons, and electrons.

• A tiny particle that makes up all matter.

• A molecule that is formed from two or more different types atoms.

• A molecules that is formed from the same type of atoms.

Tags

NGSS.MS-PS1-1

A proton is a _____ charged particle.

• Negatively
• Positively

An electron is a _____ charged particle.

• Positively
• Negatively

Tags

NGSS.MS-PS2-3

What is an atomic number?

• The sum of protons and neutrons in an atom.
• The sum of protons and electrons in an atom.
• The number of protons in an atom of a specific element.
• The number of neutrons in a specific element.