All matter is made of

• atoms
• cells

Tags

NGSS.MS-PS1-1

In the modern periodic table elements are arranged by:

• atomic mass
• atomic number
• valence electrons
• number of isotopes

How many neutrons are in one atom of Beryllium?

• 4

• 9

• 5

• 2

Tags

NGSS.MS-PS1-1

What is the chemical symbol for Lithium?

• H
• He
• Li
• N

Tags

NGSS.HS-PS1-1

Most of the elements on the periodic table are classified as "metal".

• True
• False

What Greek philosopher suggested that the universe was made of invisible units called atoms

• Democritus

• Dalton

• Jefferson

A nucleus of an atom contains what two parts?

• Electrons and Protons

• Neutrons and Electrons

• Protons and Neutrons

Tags

NGSS.HS-PS1-8

Isotopes of an element have different number of ___________ and therefore have different masses.

• Proton

• Neutron

• Electon

Tags

NGSS.HS-PS1-8

If an atom has an atomic mass of 11 and contains 5 electrons, its atomic number would be______

• 11

• 5

• 6

Tags

NGSS.HS-PS1-1

The abbreviation is commonly used to express atomic masses?

• amu

• grams

• protons