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Flashcards in Exam Q&A Deck (28)
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1

What is the mass of Protons, Neutrons and Electrons?

Protons - 1
Neutrons - 1
Electrons - Negligible

2

What are the charges on protons, neutrons and electrons?

Protons - Positive
Neutrons - No charge
Electrons - Negative

3

What are isotopes?

Different forms of the same element with a different number of neutrons but the same number of protons and electrons - They have the same chemical properties and the same atomic number

4

What is the atomic number?

The number of protons in an atom

5

What is the mass number?

The number of protons AND neutrons in an atom

6

How many electrons do group 3 elements have on their outer shell?

3

7

The group number is...

The number of electrons on an atom's outer shell

8

What is an ion?

A charged particle

9

How does a particle become an ion?

They lose or gain electrons

10

Ionic bonding happens between...

A metal and a non-metal

11

If an atom loses 2 electrons, what charge will it have?

Positive

12

If an atom gains 2 electrons, what charge will it have?

Negative

13

In a covalent bond, electrons are...

Shared

14

Covalent bonding happens between..

2 non-metals

15

What are covalent bonds called?

Molecules

16

What are the three main states of matter?

Solid, liquid and gas

17

What is the process of a solid turning into a gas called?

Sublimation

18

What is the process of a gas turning into a solid called?

Deposition

19

Define purity?

It is made up of a single element or compound

20

What are the properties of ionic compounds?

Tight, lattice-like structure
High melting point due to very strong attraction between positive and negative ions
Cannot conduct electricity as a solid - no delocalised electrons
Can conduct electricity as a liquid - ions are free to move

21

What are the properties of graphite?

3 covalent bonds held together by weak forces, 1 in 4 electrons delocalised, no bonds between layers making it soft and slippery, has a very high melting point, can conduct electricity

22

What are the properties of diamond?

4 covalent bonds, very strong bond, regular structure, high melting point (3550), no delocalised electrons so cannot conduct electricity

23

What are fullerenes and their properties?

Molecules of carbon shaped like closed tubes or hollow balls - high melting and boiling points, black, solid, odourless

24

What colours are litmus as a acid and alkali?

Acid - red
Alkali - blue

25

What colour does phenolphthalein turn when it comes in contact with an alkali?

Bright pink

26

Methyl orange is red up to what number on the pH scale, then what happens?

At 4.5, it turns from red to yellow

27

Metal + Acid ------

Salt + Hydrogen

28

Acid + Base -----

Salt + Water