Ch5 Atoms and Isotopes

Question 1

Atoms
_ type of _
the smallest part of an _
the _ properties of an element
very _ and _

Answer 1

basic, particles
element
chemical
light, tiny

Question 2

Element
contains only _ kind of atom
Diff kinds of _ in diff elements
Diff _ in diff elements (big/small)

Answer 2

1
atom
properties

Question 3

Symbol
Represent _ of the elements
_ to _ letters max

Answer 3

names
1, 2

Question 4

Structure of atoms _ _
p _ ( carries positive charge)
n _ (carries negative charge)
e-_ (carries no charge)

Answer 4

subatomic particles
protons
electrons
neutrons

Question 5

Proton relative mass is _
Electron relative mass is _
Neutron relative mass is _

Answer 5

1
almost 0
1

Question 6

Which atom doesn’t contain neutrons?

Answer 6

Hydrogen

Question 7

Atomic number
no. on periodic table
number of _

Answer 7

protons

Question 8

Mass number
no. of _ + _
_ are too light (not counted)

Answer 8

protons + neutrons
electrons

Question 9

Atomic symbol
Shows atom _ , _ no., _ no.

Answer 9

symbol, mass, atomic

Question 10

Atomic symbol of Carbon?

Answer 10

12
C
6

Question 11

Isotope
Isotopes are _ _ of the _ _, with _ number of _ but _ numbers of _

Answer 11

Isotopes are different atoms of the same element, with the same number of protons, but different number of electrons

Question 12

Isotopes
Same _ properties (same no. of protons and electrons)
Diff _ properties (diff no. of neutrons)

Answer 12

chemical
physical

Question 13

Relative abundance of isotopes (%)
Usually one is more abundant
_ of isotopes of an elemnt in nature

Answer 13

proportion

Question 14

Atomic mass unit?

Answer 14

6.02*10^23

Question 15

Relative isotopic mass
almost equals to _ _ / _ mass
has no _

Answer 15

mass unit, atomic mass
unit

Question 16

Relative atomic mass
one for each _
_ average of _ _ masses of isotopes
Has no _

Answer 16

element
weighted, relative isotopic
unit

Question 17

isotopic mass of

2
H
1

Answer 17

2

Question 18

Relative atomic mass = _ no.*relative _ + (same with diff isotope)

Answer 18

mass, abundance

Question 19

Electrons move in diff _ _

Answer 19

electron shells

Question 20

inner- _ shell
2nd shell
3rd shell
……….
outer- _ shell

Answer 20

1st, outer

Question 21

How to cal max n. of electrons on each shell?

Answer 21

2(shell no.)^2

Question 22

Electronic arrangement
no. of _ on each _

Answer 22

electrons, shell

Question 23

Potassium electronic arrangement?

Answer 23

2,8,8,1 (last moved to 3rd)

Question 24

Calcium electronic arrangement?

Answer 24

2,8,8,2 (last 2 moved to 3rd)