Atomic Theory

Which of these elements has NO neutrons in its nucleus?

• Hydrogen

• Helium

• Lithium

• None of the above

What is the mass number of Oxygen?

• 12.00

• 14.00

• 16.00

• 18.00

Boron has an atomic number of 5 and a mass number of 11. How many neutrons are in Boron's nucleus?

• 5

• 6

• 7

• 11

What did Aristotle believe?

• That all matter was made up of atoms

• That protons were positively charged

• That electrons were found in orbits

• That matter was made up of the 4 elements

Who is the "Father of Atomic Theory" ?

• Democritus

• JJ Thomson

• John Dalton

• Ernest Rutherford

When JJ Thomson conducted his Cathode Ray Tube Experiment, what did he discover?

• That protons are positively charged

• That neutrons have no charge

• That electrons are negatively charged

• That electrons are located in orbits

What does the mass number tell us about an element?

• The sum of protons and neutrons in the nucleus

• The sum of neutrons and electrons in the nucleus

• The sum of protons and electrons in the nucleus

• The difference of protons and neutrons in the nucleus

In an atom, what subatomic particle is in equal amount to the proton?

• Neutrons

• Electrons

• Megatron

• Ultron

How is an element's identity determined?

• By mass number

• By the isotopes of that atom

• By atomic number

• By the electrons in its outer orbit

The smallest piece that matter can be divided into is called...

• electron

• neutron

• isotope

• atom

Tags

NGSS.MS-PS1-1