CHEMISTRY I: Groups of Elements

Question 1

Which is correct?

Accepted Answer

Cl2 + 2NaBr --> 2NaCl + Br2

Question 2

How many valence electrons do the Alkali Metals have?

Accepted Answer

1

Question 3

Which of these is the electronic arrangement for the sodium ion?

Accepted Answer

[2:8]+

Question 4

(all further questions about group I exclude H)

Accepted Answer

Oxygen Potassium

Question 5

Which is the correct order of reactivity - most reactive first?

Accepted Answer

Na>Mg>Al

Question 6

Are all the noble gases, gases?

Accepted Answer

yes

Question 7

Fluorine is the smallest halogen, so another e- can get closest to the nucleus.

Accepted Answer

this explain fluorines high reactivity

Question 8

As group VII is descended reactivity decreases?

Accepted Answer

true

Question 9

Hi !

Accepted Answer

V, VII

Question 10

Which is NOT true about group I ?

Accepted Answer

They get less reactive as the group descends

Question 11

All alkali metals float on water.

Accepted Answer

true

Question 12

Ca reacts with water. Mg does not.

Accepted Answer

Ca is more reactive

Question 13

sodium plus chlorine -->

Accepted Answer

sodium chloride

Question 14

What acid is used to make calcium nitrate?

Accepted Answer

nitric acid

Question 15

Alkali metals are hard to cut.

Accepted Answer

false

Question 16

Which is the least dangerous?

Accepted Answer

fluoride, F-

Question 17

Why is F- not dangerous? I has ...

Accepted Answer

already taken the e- it needs

Question 18

Which of these is NOT a use for a halogen?

Accepted Answer

McGuffin

Question 19

How many electrons do the halogens have in their valence shell?

Accepted Answer

(2)3 -1, √49, 0----7

Question 20

Explain the previous trend.

Accepted Answer

sodium only needs to lose 1e- to react, Al has to lose the most e-, it is easiest to lose 1 e-, it is hardest to lose 3e-

Question 21

Which is more reactive?

Accepted Answer

group I

Question 22

What is the test for hydrogen? Lit splint (wood) gives

Accepted Answer

squeaky pop

Question 23

What salt is made by reacting magnesium with sulphuric acid?

Accepted Answer

magnesium sulphate

Question 24

Why is Francium the least reactive?

Accepted Answer

Valence e- least attracted to nucleus

Question 25

Why are noble gases unreactive?

Accepted Answer

the have a full valence shell

Question 26

Which gas is released when group I is reacted with water?

Accepted Answer

hydrogen

Question 27

2Na(s) + 2H2O(l) -->

Accepted Answer

2NaOH(aq) + H2(g)

Question 28

What is produced when beryllium reacts with hydrochloric acid?

Accepted Answer

BeCl2

Question 29

Which element in group I is normally not considered to be a member!?

Accepted Answer

H

Question 30

What type of substance does group I make when reacted with water?

Accepted Answer

alkaline

Question 31

Which of thee properties do NOT apply to alkali metals?

Accepted Answer

brittle

Question 32

Which of these are a use of Helium?

Accepted Answer

MRI, balloons, deep sea diving gas

Question 33

aluminium chloride

Accepted Answer

AlCl3

Question 34

Why property is the same for both alkali metals AND transition metals?

Accepted Answer

ductile

Question 35

Do both group I AND group II get more reactive as the group is decended?

Accepted Answer

yes

CHEMISTRY I: Groups of Elements

Questions 35

CHEMISTRY I: Groups of Elements

Questions 35