Electron Structure&Chemical Bonding

Question 1

A pure substance made of only one kind of atom.

Answer 1

Element

Question 2

A chemical compound is..?

Answer 2

Substance of two or more atoms chemically joined.

Question 3

Proton charge

Answer 3

+1

Question 4

Neutron charge

Answer 4

0

Question 5

Electron charge

Answer 5

-

Question 6

The bottom number is…?

Answer 6

Number of protons (atomic number)

Question 7

Mass number is..?

Answer 7

Protons+neutrons (top number)

Question 8

Neutrons=

Answer 8

Top-bottom number

Question 9

What must equal in an atom?

Answer 9

Protons&Electrons

Question 10

Isotope have…

Answer 10

Different mass so different neutrons

Question 11

They have the same …. but different ….

Answer 11

Chemical properties

Physical properties

Question 12

The larger the mass, the …. melting point.

Answer 12

Higher

Question 13

The TOF is based on an atoms…

Answer 13

Mass

Question 14

To find the Ar in TOF

Answer 14

(Abundance x m/z) x (abundance x m/z)

100

Question 15

Order of sub levels

Answer 15

1s2 2s2 2p6 3s2 3p6 4s2 3d10

Question 16

What elements are an exception of the sublevels?

Answer 16

Cu and Cr

Question 17

What loses electrons?

Answer 17

Metals

Question 18

What gains/shares electrons?

Answer 18

Non-metals

Question 19

What behaviour of group of elements is inbetween sharing electrons?

Answer 19

Metalloids

Question 20

Why is 4s higher than 3D?

Answer 20

Due to energetically

Question 21

What is ionic bonding?

Answer 21

Chemical attraction by electrostatic force of attraction between OPPOSITELY CHARGED IONS.

Question 22

What bonding forms a lattice?

Answer 22

Ionic

Question 23

What bonding is a pair of electrons shared between two non-metals?

Answer 23

Covalent

Question 24

Dative Covalent bonding is…?

Answer 24

Electron shares between one atom

Question 25

The measure of the relative ability of an atom to attract a shared electron pair in a covalent bond is?

Answer 25

Electronegativity

Question 26

Electronegativity depends on 3 things:

Answer 26

1. Nuclear charge 2. Atomic radius 3. Shielding

Question 27

What does electronegativity favour?

Answer 27

Large nuclear charge Small atomic radius Low shielding

Question 28

Electronegativity increases...

Answer 28

Across a period

Question 29

Electronegativity decreases...

Answer 29

Down a group

Question 30

Bond polarity is caused by

Answer 30

Unequal share of electrons

Question 31

Even sharing of electrons...?

Answer 31

Non-polar

Question 32

Is in a linear shape, polarity....

Answer 32

Cancels out

Question 33

Intermolecular forces from weak to strong

Answer 33

1. Van deer walls 2. Dipole-dipole 3. Hydrogen

Question 34

Ionic compound properties (4)

Answer 34

1. Brittle 2. High melting point 3. Good conductor of electricity when dissolved 4. Solid at room temp

Question 35

Properties of covalent compounds (3)

Answer 35

Gases or liquid at room temp Low boiling points Poor conductors

Question 36

Hydrogen bonding only in...

Answer 36

Nitrogen Fluorine Oxygen