Atomic

Which two components of an atom contribute to the mass?

• Neutrons and electrons

• Protons and neutrons

• Protons and electrons

The central region of an atom, where its neutrons and protons are found, is called the

• Nucleus

• Center

• Electron cloud

• Core

All matter is made of what?

• Electrons

• Energy

• Compounds

• Atoms

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

In a correctly written symbol, what would be located in the "A" position?

• Mass number

• Number of neutrons

• Number of electrons

• Atomic number

In a correctly written symbol, what would be located in the "Z" position?

• Mass number

• Element's symbol

• Number of electrons

• Atomic number

How many protons does this isotope of titanium have?

• 22

• 70

• 48

• 26

How many electrons does an uncharged (neutral) atom if neon have?

• 9

• 10

• 8

• 11

True or False: Neutrons have a negative charge.

• True

• False

What is an isotope?

• Two atoms of the same element with different numbers of protons

• A charged atom

• A neutral atom

• Two atoms of the same element with different numbers of neutrons

What quantities vary between isotopes of an element?

• Neutrons and mass number

• Neutrons and electrons

• Protons, electrons, and atomic number

• Protons, electrons, and atomic mass