CH. 16 Properties of Atoms and Periodic Table

The central core of an atom is called the hub.

• True

• False

Elements arranged in horizontal rows on the periodic table are called periods.

• True

• False

The region around the nucleus occupied by the electrons is called the negative zone.

• False

• True

The symbol for Chlorine is C.

• False

• True

The maxium number of electrons in the second energy level is 8.

• True

• False

Two isotopes of carbon are carbon-12 and carbon-14. These isotopes differ from one another by two protons.

• True

• False

Tags

NGSS.HS-PS1-8

In 1926, scientists developed the Bohr model of the atom that is in use today.

• True

• False

The sum of the protons and neutrons in an atom is equal to what _____.

• The number of electrons

• The atomic number

• The mass number

• The average atomic mass

All elements except two want how many valence electrons?

• 2

• 18

• 8

• 32

Tags

NGSS.HS-PS1-1

The atomic number of an element will tell you how many protons there are in an atom.

• True

• False