Unit 1.2 Vocabulary

Question 1

Atoms are electrically neutral

Answer 1

Because the number of protons equals the number of electrons

Question 2

Mass Number

Answer 2

the sum of the number of neutrons and protons in an atomic nucleus (P + N)

Question 3

AZE notation

Answer 3

A = Mass #, Z = Atomic #, E = Chemical Symbol

Question 4

Atomic number

Answer 4

the number of protons in the nucleus of an atom

Question 5

Mass Spectroscopy

Answer 5

Technique used to identify the isotopes of an element and their relative abundance in nature

Question 6

x-axis in mass spectroscopy graph

Answer 6

The isotope or mass number of the element

Question 7

Y axis of mass spectrum graph?

Answer 7

Abundance of ions often percentage for elements height of each peak gives relative isotope abundance

Question 8

Relative abundance

Answer 8

Percent abundance/100

Question 9

How to calculate average atomic mass

Answer 9

Average atomic mass = ∑ (mass of isotope x percent abundance of isotope)