Periodic Table And Atomic Stucture

Question 1

How is the periodic table arranged

Answer 1

The elements in order of increasing atomic number

Question 2

What can the periodic table determine

Answer 2

Wether an element is metal or non metal

Question 3

What are groups in the periodic table

Answer 3

Groups are columns containing elements with the same number of outer electrons indicated by the group number

Question 4

What do elements in the same group have in common

Answer 4

Elements within a group share the same valency and have similar chemical properties because they
have the same number of electrons in their outer energy levels.

Question 5

What makes up an atom?

Answer 5

A nucleus, containing protons and neutrons, and electrons orbit the nucleus

Question 6

What charge does a proton have

Answer 6

positive

Question 7

what charge does a electron have

Answer 7

One - negative

Question 8

What charge does a neutron have

Answer 8

Neutral = 0

Question 9

What mass does proton, neutrons and electrons have

Answer 9

Protons and neutrons have an approximate mass of one atomic mass unit and electrons, in
comparison, have virtually no mass.

Question 10

What is the atomic number

Answer 10

The number of protons in an atom

Question 11

How do u know the number of electrons and protons are the same

Answer 11

In a neutral atom the number of

electrons is equal to the number of protons.

Question 12

What is the mass number

Answer 12

The mass number of an atom is equal to the number of protons added to the number of neutrons

Question 13

What are isotopes

Answer 13

Isotopes are defined as atoms with the same atomic number but different mass numbers, or as
atoms with the same number of protons but different numbers of neutrons.

Question 14

What is nuclide notation

Answer 14

Nuclide notation is used to show the atomic number, mass number (and charge) of atoms (ions)
from which the number of protons, electrons and neutrons can be determined.

Question 15

How is ram calculated

Answer 15

The average atomic mass has been calculated for each element using the mass and proportion of
each isotope present. These values are known as relative atomic masses.

Question 16

What do covalent bonds for between

Answer 16

Non metal atoms

Question 17

What is a covalent bond

Answer 17

A covalent bond forms when two positive nuclei are held together by their common attraction for a
shared pair of electrons

Question 18

How can simple molecules be described

Answer 18

These molecules can be described as linear, angular, trigonal pyramidal or tetrahedral.

Question 19

How. many bonds can be formed between atoms

Answer 19

More than 1

Question 20

What are the 7 diatomic molecules

Answer 20

H2, 02, N2, F2, Cl2, Br2, I2

Question 21

What is an element

Answer 21

An element is a substance made out of one type of atom

Question 22

What is a compound

Answer 22

A compound is when 2 or more different elements chemically join/bond together

Question 23

What is a molecule

Answer 23

A molecule is 2 or more atoms

Question 24

What percentage of the periodic table is metals

Answer 24

80%

Question 25

What percentage of the periodic table is non metals

Answer 25

20%

Question 26

What is group 1

Answer 26

Alkali metals

Question 27

What is group 2

Answer 27

Alkaline Earth metals

Question 28

Between group 2+3

Answer 28

Transition metals

Question 29

Group 7

Answer 29

Halogens

Question 30

Group 8

Answer 30

Noble gases

Question 31

Why don’t the noble gases react

Answer 31

The noble gases have a full outer energy level . This makes them unreactive and stable

Question 32

If a molecule has 2 atoms what shape is it?

Answer 32

Liner

Question 33

If a molecule has 3 atoms what is its shape called?

Answer 33

V-shaped or angular

Question 34

If a molecule has 4 atoms what is its shape called?

Answer 34

Trianganal pyramidal

Question 35

If a molecule has 5 atoms what is its shape called?

Answer 35

Tetrahedral

Question 36

Mass of an electron

Answer 36

1/2000

Question 37

Mass of proton

Answer 37

1

Question 38

Mass of neutrons

Answer 38

1

Question 39

What does covalent molecular substances have between molecules

Answer 39

weak forces

Question 40

Do covalent molecular have high or low melting or boiling points

Answer 40

Low melting and boiling points

Question 41

Do covalent molecular substances conduct electricity

Answer 41

No because they do not have charged particles which are free to move

Question 42

Do covalent networks have strong bonds or weak forces

Answer 42

Strong bonds within one giant structure

Question 43

Do covalent networks have low or high melting and boiling points

Answer 43

High because the network of strong bonds is not easily broken

Question 44

Do covalent networks dissolve or conduct

Answer 44

No beca they have no charged particles that are free to move

Question 45

What are ions

Answer 45

Ions are formed when atoms lose or gain electrons to obtain the stable electron arrangement of a noble gas.

Question 46

Generally what charges are metals and non metals

Answer 46

In general, metal atoms lose electrons forming positive ions and non-metal atoms gain electrons forming negative ions. Ion-electron equations can be written to show the formation of ions through loss or gain of electrons.

Question 47

What are ionic bonds

Answer 47

The electrostatic attraction between positive and negative ions. They want to become stable Ionic bonds transfer electrons

Question 48

What ionic compounds structure

Answer 48

3D lattice

Question 49

Do ionic compound have high or low melting and boiling points

Answer 49

High because strong ionic bonds must be broken in order to break up the lattice

Question 50

In general are ionic compounds soluble in water

Answer 50

Yes

Question 51

Do ionic compounds conduct

Answer 51

Yes but only when molten or in solution as the lattice structure breaks up allowing the ions to be free to move

Question 52

If a compound has 2 elements it ends in what

Answer 52

‘ide’

Question 53

If the compound ends in ‘ite’ or ‘ate’ what does this tell us

Answer 53

That oxygen is present

Question 54

mono

Answer 54

1

Question 55

di

Answer 55

2

Question 56

Tri

Answer 56

3

Question 57

Tetra

Answer 57

4

Question 58

Penta

Answer 58

5

Question 59

Hexa

Answer 59

6

Question 60

Hepta

Answer 60

7

Question 61

Covalent bonds exists between what

Answer 61

Non metals only

Question 62

Ionic bonds exists between

Answer 62

Compounds ie metals and non metals

Question 63

What is electricity

Answer 63

The flow of electrons