C1 Atomic structure and the periodic table Flashcards Preview

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Flashcards in C1 Atomic structure and the periodic table Deck (62)
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1

Give the state and colour of each of the halogens at room temperature.

Chlorine = Green gas
Bromine = Orange liquid
Iodine = Grey solid
(Iodine forms a purple vapour when it is warmed)

2

What special something do Group 0/ Noble gases have about their outer shell of electrons?

The outer shell of Group 0 is full which makes it both unreactive and very stable.

3

What is distillation used for ?
A evaporating the liquid from a mixture to collect the solid.
B the separation of a liquid from a mixture using evaporation then condensation.
C the separation of solutes for analysis.
D the removal of salt from water

Distillation is used for :B the separation of a liquid from a mixture using evaporation then condensation

4

Explain what we mean by subatomic particles

protons, neutrons and electrons

5

Why does chlorine push bromine out of potassium bromide?

In a displacement reaction, a less reactive element is displaced by a more reactive element.

6

Explain what we mean by filtration

Filtration is a method for separating an insoluble solid from a liquid.

7

Explain what we mean by a mixture.

Mixtures can easily be be separated using their physical properties (such as size, boiling point or solubility)

8

Explain what we mean by an electron

Electrons are negatively charged tiny particles which are contained in shells around the nucleus.

9

Explain what we mean by electron configuration

This means the number of electrons in each shell. Helium would be 2, Lithium 2,,1 and Argon 2,8,8.

10

Explain what we mean by chemical formulae

The chemical formula of a compound tells you how many atoms of each element the molecule contains. e.g CuSO4

11

John Dalton was the first person to start sorting elements into a periodic table. How did he sort them?

John Dalton sorted the elements in his periodic table by increasing atomic mass.

12

What was the pattern that John Newlands noticed in the elements within Dalton's periodic table?

John Newlands noticed that the eighth elements in Dalton's periodic table had similar properties.

13

Who discovered that electrons orbit the nucleus in shells?

Neils Bohr discovered that electrons orbit the nucleus in shells.

14

Explain what we mean by chromatography

Paper chromatography is a method for separating dissolved substances from one another. It works because some of the coloured substances dissolve in the solvent used better than others, so they travel further.

15

How many electrons do Group 1 have in their outer shell?

Group 1 elements all have in 1 electron in their outer shell

16

Why does fractional distillation work?

Fractional distillation works because the liquids in the mixture have different boiling points.

17

What is chromatography used for?
A to separate a solid from a liquid.
B to separate out dissolved solids.
C to separate a liquid from a solution.
D to separate a mixture of liquids

Answer D: Chromatography is used to separate a mixture of liquids

18

What group is Cl in?

Cl is in Group 7

19

How many neutrons are there in 184W74

There are 110 neutrons in 184W74

20

How does paper chromatography work?

Paper chromatography works because some of the coloured substances dissolve in the solvent better than others, so they travel further up the paper.

21

Explain what we mean by an element.

An element is a substance that is made of only one sort of atom. They are listed in the periodic table.

22

Why are alkali metals stored in oil?

Alkali metals are stored in oil to prevent them reacting with air.

23

Explain the difference between a compound and a mixture.

A mixture can easily be separated.
Compounds contain elements which have reacted chemically and are firmly attached to each other..

24

What are elements in group 7 called?

Elements in group 7 are called halogens

25

From the 3 sub atomic particles choose 2 which are the same size?

The proton and neutron are the same size.

26

Water has a boiling point of 100 °C. At what temperature does water evaporate?

Water evaporates when the top layer of particles reach 100 °C. Boiling means ALL the particles are at 100 C

27

I have 2 electrons in my first shell and 3 electrons in my second shell. Which element am I?

I am Boron

28

How many protons or electrons are there in 56Fe26

There are 26 protons or electrons are in 56Fe26

29

Which 2 sub atomic particles have opposite charges which hold the atom together?

The electron is negative and the proton is positive

30

What did Mendeleev do to improve Dalton and Newlands periodic table?

Mendeleev took their ideas but also left spaces where elements didn't fit the pattern. Once elements were discovered they fitted in exactly proving his design worked.