Understanding the Periodic Table of Elements

What determines the type of element an atom is?

• The number of neutrons

• The number of electrons

• The number of protons

• The atomic mass

In a neutral atom, what must be equal to the number of protons?

• The number of neutrons

• The number of valence electrons

• The number of electrons

• The atomic mass

What is the significance of valence electrons?

• They are equal to the number of protons

• They determine the chemical reactivity

• They are found in the innermost shell

• They determine the atomic mass

What do elements in the same group of the periodic table have in common?

• The same number of protons

• The same atomic mass

• The same number of valence electrons

• The same atomic number

Which category of elements is known for having high boiling and melting points?

• Non-metals

• Metalloids

• Metals

• Noble gases