Properties of atoms

Magnesium has 12 electrons. In how many energy levels are the electrons of magnesium?

• 1 energy leve

• 2 energy levels

• 3 energy levels

• 4 energy levels

What do all elements in a group have in common?

• same atomic numbers

• same atomic masses

• same number of electrons in outershells

• same atomic size

Letter or letters that are the abbreviation for the element in the periodic table.

• Atomic Number
• Atomic Mass
• Name
• Atomic Symbol

Number of protons in the nucleus of the atom (usually also the number of electrons).

• Atomic Mass
• Atomic Number
• Name
• Atomic Symbol

A subatomic particle that has a positive charge and that is found in the nucleus of an atom.

• Atom
• Proton
• Element
• Electron

A subatomic particle that has a negative charge.

• Proton
• Atom
• Electron
• Neutron

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

The Modern Periodic Table of Elements is arranged by

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The atomic number tells you what?  READ THE ANSWERS CAREFULLY

• only the number of electrons
•  only the number of protons
• only the number of neutrons
• the number of both electrons and protons in an atom.

What does the atomic mass tell you? 

• Basically,the number of electrons and protons
• The number of neutrons
• Basically, the number of protons and neutrons
• The number of protons.