39. ANS:
Name of element
chromium
does not exist
aluminum
fluorine
Atomic
Mass
number number
Number
of
protons
Number
of
neutrons
24
2
13
10
40. ANS:
Name of element
Magnesium
Atomic
Mass
number number
12
22
16
8
Number
of
protons
Number
of
neutrons
48
16
8
41. ANS:
Marking: 1 point for correct number of neutrons in the nucleus, 1 point for correct
number of protons in the nucleus, and 1 point for correct electron configuration
42. ANS:
14 | P a g e