Atomic Structure and the periodic table.

Question 1

What is the relative charge of electron particles?

also proton and neutrons.

Answer 1

Electrons= -1
Protons=+1
Neutrons=0

Question 2

Name the region where most of the mass of the atom is concentrated.

Answer 2

Nucleus.

Question 3

Define a compound.

Answer 3

two or more elements chemically combined

e.g ammonia (NH3)

Question 4

Define an isotope.

Answer 4

different versions of the elects each with the same number of protons, however different numbers of neutrons.

Question 5

39
K name the protons, neutrons + electrons.
19

Answer 5

Protons=electrons (19)

Neutrons= 39-19 (20)

Question 6

What is the charge of a proton?

Answer 6

+1

Question 7

True or false? Elements contain more than one type of atom.

Answer 7

false only atoms with the same number of protons are contained within elements.

Question 8

Give the formula for Carbon dioxide.

Answer 8

CO2

Question 9

Give the formula for Sodium Carbonate.

Answer 9

Na2CO3

Question 10

What is the difference between a compound and a mixture?

Answer 10

unlike compounds the is no chemical bond between the different parts of a mixture.

Question 11

What is the name of the pattern formed from carrying out paper chromatography?

Answer 11

chromatogram

Question 12

Which method of separation is useful to separate an insoluble solid from a liquid?

Answer 12

Filteration

Question 13

Give the name of a method to separate a soluble solid from a liquid.

Answer 13

evapouration.

Question 14

Which method of distillation would you use to separate liquids with similar boiling points?

Answer 14

fractional distillation

Question 15

Who discovered that the plum pudding model was wrong?

Answer 15

Rutherford.

Question 16

Who first devised an experiment that proved the existence of the neutron?

Answer 16

James Chadwick

Question 17

What is the electronic structure of sodium?

Answer 17

2, 8, 1

Question 18

Why did Mendeleev leave gaps in his table of elements?

Answer 18

To make sure elements with similar properties stayed in the same groups..

Question 19

How are the group number and the number of electrons in the outer shell of an element related?

Answer 19

The number of electrons in the outer shell was the same number as the group.

Question 20

What kind of ions do metals form?

Answer 20

metals form positive ions.

Question 21

Where are non-metals on the periodic table?

Answer 21

Far right and top of the periodic table.

Question 22

State three trends as you go down group 1.

Answer 22

All have one electron in their outer shell.
All metals and react in a similar way.
React more vigorously as you go down the group.

Question 23

State the products of the reaction of sodium and water.

Answer 23

sodium hydroxide + hydrogen

Question 24

How do the boiling points of halogens change as you go down the group from fluorine to astatine?

Answer 24

The reactivity decreases
Higher melting and boiling points
higher relative atomic masses

Question 25

What is the charge of the ions that halogens form when they react with metals?

Answer 25

1- ions called Halides

Question 26

Predict whether iodine is displaced by chlorine in a solution of potassium iodine.

Answer 26

yes

Question 27

What is the trend in boiling point as you go down Group 0?

Answer 27

Boiling points of noble gases increase as you move down the group and increase relative atomic masses.