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Flashcards in Term 1 Deck (29)
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1

What is a molecule?

A particle with two or more atoms joined together.

2

What is a compound?

Two or more elements chemically bonded and have fixed proportions.

3

If a substance ends in 'ide' it is a...

Compound

4

If a substance ends in 'ate', it means...

There are more than one non-metal elements and the last one is oxygen.

5

What is a mixture?

Two or more elements that are not chemically bonded and are not in fixed proportion.

6

What is an atom?

The smallest part of an element that can exist.

7

What is element?

A substance made from only one type of atom.

8

Elements can be...

single atoms, molecules or giant structures.

9

What is in an atoms nucleus?

Protons and neutrons

10

What is the nucleus surrounded/orbited by?

Electrons

11

What do electrons float in?

Energy levels/shells

12

What do protons and electrons have in common in atoms?

There is always the same number of protons as electrons.

13

What is the protons relative mass and relative charge?

RM- 1
RC- +1

14

What is the electrons relative mass and relative charge?

RM- 1/1836
RC- -1

15

What is the neutrons relative mass and relative charge?

RM- 1
RC- 0

16

What is the atomic number?

Number of protons (bottom number)

17

What is the mass number?

Number of protons and number of neutrons (top number)

18

What is an isotope?

Atoms with the same number of protons but different number of neutrons. This means they are atoms of the same element with the same atomic number but a different mass number.

19

What is an ion?

Particles that contain a different number of protons and electrons. For example, an ion with 11 protons
(11+ charges) and 10 electrons (10– charges) has an overall charge of 1+

20

What is the link between the electron structure of ions and noble gas atoms?

They all have an even number of electrons on their outer shell. Also they have the same electron structure.

21

What are some physical properties of Group 1 metals?

They get softer as you go down, they are shiny on the inside/as soon as cut but then tarnishes by reacting to oxygen. Grey/dull silver.

22

What is the trend in melting points in Group 1?

They all decrease as you go down.

23

When group 1 elements react, what happens to their electron structure.

They lose the one electron on their outer shell.

24

Where do these electrons go?

Passes onto the element reacting with it.

25

What compound is formed when group 1 elements react?

Ionic compound

26

Why is an ionic compound formed?

They lose one electron from the outer shell so it doesn't have the same amount of electrons as protons. This makes it like a noble gas electron structure.

27

Why do group 1 elements react so much?

The single electron on the outer shell gets further away from the nucleus meaning the atom loses it more willingly and it is effected less from the pull of the nucleus so it reacts.

28

What happens when you go down the group 1 elements?

Reactivity increases.

29

What are group 1 elements also called?

Alkali metals.