Atoms and the Periodic Table

The subatomic particle with a positive charge is a(n)

• proton

• neutron

• electron

The subatomic particle with a negative charge is a(n)

• proton

• neutron

• electron

The subatomic particle with no charge is a(n)

• proton

• neutron

• electron

What does an element's atomic number tell you?

• The number of protons

• The sum of protons + neutrons

• When the element was discovered

• The importance of the element

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

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

Tags

NGSS.MS-PS1-1

Atoms with the same number of protons and different numbers of neutrons are called ____________.

• Noble Gases

• Isotopes

• Atomos

• Compounds

If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the atomic mass of the atom?

• 10

• 20

• 30

Tags

NGSS.MS-PS1-1

Which scientist created the first version of the Periodic Table?

• Democritus

• Neils Bohr

• Dmitri Mendeleev

• Ernest Rutherford

What are valence electrons?

• Any of an atom's electrons

• Electrons located on the first energy level

• Electrons not attached to any atom

• electrons located on the outer energy level

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In the modern periodic table elements are arranged by:

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