Topic 1 - Key Concepts

Question 1

How did Mendeleev order the elements?

Answer 1

In order of atomic mas

Question 2

Where did Mendeleev put elements with similar properties?

Answer 2

In the same row

Question 3

Where are atoms with similar properties on the periodic table

Answer 3

The same group

Question 4

How do you find the number of neutrons in an atom

Answer 4

Atomic mass - number of protons

Question 5

Total relative charge of an atom

Answer 5

0

Question 6

Total relative charge of the nucleus of an atom

Answer 6

+1

Question 7

3 key scientists linked with atomic structure

Answer 7

John Dalton, JJ Thompson, Ernest Rutherford

Question 8

Where is most of the mass concentrated in an atom

Answer 8

The nucleus

Question 9

Compare the size of the nucleus to the overall size of the atom?

Answer 9

It is very small compared to the overall size of the atom

Question 10

What did Mendeleev do with undiscovered elements in his periodic table?

Answer 10

He left gaps for where they would be for when they were discovered in the future

Question 11

The modern periodic table is ordered in…

Answer 11

Atomic number

Question 12

What is the relative charge of a proton?

Answer 12

+1

Question 13

What is the relative mass of a proton?

Answer 13

1

Question 14

What is the relative mass of a neutron?

Answer 14

1

Question 15

What is the relative charge of a neutron?

Answer 15

0

Question 16

Rows on the periodic table are known as…

Answer 16

Periods

Question 17

What is the relative mass of an electron?

Answer 17

1/1835

Question 18

What is atomic mass?

Answer 18

The total relative mass of the nucleus of an atom

Question 19

What is the relative charge of an electron?

Answer 19

-1

Question 20

What is the maximum number of electrons in an atoms third shell?

Answer 20

8

Question 21

What is the maximum number of electrons in an atoms first shell?

Answer 21

2

Question 22

What does the group number tell you about the electronic configuration of an atom?

Answer 22

The amount of electrons in its outer shell

Question 23

How are electrons arranged?

Answer 23

In shells that surrounded and orbit the nucleus

Question 24

What does the periodic number tell you about an atoms electronic configuration?

Answer 24

How many shells of electrons that element has

Question 25

What is cracking?

Answer 25

Breaking down larger alkanes into smaller, more useful alkanes and alkenes

Question 26

What is the equation for moles?

Answer 26

Moles = mass / molar mass

Question 27

What is the atomic number?

Answer 27

The number of protons

Question 28

What is an isotope?

Answer 28

An element with the same number of protons but different number of neutrons