Atom Structure and the Periodic Table

The following element key shows how many protons?

• 16
• 15.999
• Oxygen
• 8

Which particles make up the nucleus of an atom?

• protons and neutrons
• electrons and protons
• electrons, protons, and neutrons
• electrons and neutrons

The subatomic particle that determines the identity of an element.

• neutron
• proton
• electron
• outer shell

How many protons, electrons and neutrons are present in an atom of carbon, C, with the mass of 12?

• 12 protons, 12 electrons, 12 neutrons

• 6 protons, 12 electrons, 6 neutrons

• 12 protons, 6 electrons, 12 neutrons

• 6 protons, 6 electrons, 6 neutrons

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

• 11
• 5
• 6
• 16

All of the actinides are ___________.

• stable
• radioactive
• shiny
• named after scientists

Elements which are shiny, conduct electricity and heat are called

• metal
• nonmetal
• metalloid
• nonexistent

The atoms along the staircase are called 

• metals
• nonmetals
• metalloids
• noble gases

The family in the periodic table that contains the most reactive metals is the_______

• Alkaline Earth Metals
• Transition Metals 
• Alkali Metals
• Other Metals

Most noble gases have _______ valence electrons.

• 1

• 2

• 7

• 8