Atomic Structure, The Periodic Table and Chemical Bonding

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Look at this picture of Argon off the periodic table. Which of the following is true for this element?

• 18 protons

• 40 protons

• 22 protons

• 21.9 protons

Which part of an atom is used to identify it?

• number of protons

• number of neutrons

• number of electrons

The nucleus of an atom is made of

• electrons and protons
• electrons and neutrons
• protons and neutrons
• empty space

The number of these determines which element an atom is.

• neutrons
• electrons
• protons

For a given element, the atomic number indicates the number of _____

• protons in the nucleus
• neutron in the nucleus
• electrons in the atom
• nucleons in the atom

What is the mass number?

• the number of protons
• the sum of the number of protons and the number of neutrons in the nucleus of an atom 
• the number of electrons
• the number of neutrons

an atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

What is the Element's atomic number?

• Fe
• 26
• 55.847
• Iron

An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?

• 15
• 31
• 16
• 47