The atomic structure and the periodic table

The sum of the protons and neutrons in the nucleus of an atom is called ------

• Atomic Number
• Compound
• Electrons
• Mass Number

What is the term for the number of protons in the nucleus of an atom?

• Mass Number

• Atomic Number

• Neutron Number

• Electron Configuration

Which particle in an atom has a negative charge?

• Proton

• Neutron

• Electron

• Nucleus

What is the term for atoms of the same element that have different numbers of neutrons?

• Isotopes

• Ions

• Isomers

• Allotropes

Elements in the same group of the periodic table have the same number of:

• Neutrons

• Protons

• Valence electrons

• Atomic mass

How many electrons can the second energy level of an atom hold?

• 2

• 4

• 8

• 10

Each of the following is a solid metal, except -----

• Aluminum

• Mercury

• Magnesium

• Silver

Which of the following represents the electron configuration of three metals?

• (A): 2,8,2
  (B): 2,8,3

  (c): 2,8,4

• (A): 2,1
  (B): 2,8,3

  (c): 2,8,8,2

• (A): 2
  (B): 2,8,3

  (c): 2,8,8,2

• (A): 2,5
  (B): 2,7

  (c): 2,6

The atomic number of Aluminum is 13, therefore its electron configuration is -----

• 2, 10, 1

• 2, 8, 3

• 2,11

• 2,6,5

The number of protons in Fluorine is 9, therefore, its valency equals ------