Parts of an Atom

Question 1

Atomic Mass

Answer 1

Represents the mass listed on the periodic table (weighted average of all isotopes)

Question 2

Mass Number

Answer 2

Protons and Neutrons for a given isotope

Question 3

Proton

Answer 3

Mass of one, positively charged

Question 4

Neutron

Answer 4

Mass of 1, neutral charge

Question 5

Electron

Answer 5

Negligible mass, negative charge

Question 6

Neutral Atoms

Answer 6

• Atoms are neutral wen the number of protons is equal to the number of electrons
• Neutral atoms have a charge of 0

Question 7

Changing the Element

Answer 7

• When the number of protons changes the type of element changes
• The number of protons in the nucleus determines the type of element

Question 8

Changing the Charge

Answer 8

• When electrons are added to an atom the atom becomes more negative.
• When electrons are taken away, the atom becomes more positive.
• A negatively or positively charged atom is an ion.

Question 9

Changing the Mass Number

Answer 9

• Atomic mass= protons+neutrons
• Neutrons can increase or decrease the mass of an atom
• Increasing neutrons will increase the mass
• Decreasing neutrons will decrease the mass