Atoms and Periodic Table

Question 1

What does the Periodic table show?

Accepted Answer

All of the above

Question 2

Which of the following is TRUE?

Accepted Answer

Sea water freezes at lower to and evaporates at higher to

Question 3

Which of the following statements about FRACTIONAL distillation is FALSE?

Accepted Answer

It is used for liquids that are not miscible

Question 4

Which formula of aluminum oxide is CORRECT?

Accepted Answer

Al2O3

Question 5

Which is the formula of the magnesium nitrate?

Accepted Answer

Mg(NO3)2

Question 6

Which of the compounds is NOT ionic?

Accepted Answer

H2O

Question 7

Which of the statements is FALSE?

Accepted Answer

Boiling t of pure substance is constant everywhere on Earth

Question 8

Which method should be used to separate salt from water?

Accepted Answer

Crystallisation

Question 9

Which state of matter has a constant volume, but changes its shape?

Accepted Answer

Liquid

Question 10

Which method should be used to separate liquids that do not mix?

Accepted Answer

Decantation

Question 11

Which molecule has the following configuration?

Accepted Answer

H2O

Question 12

Which element does uranium turn into when it emits an alpha-particle?

Accepted Answer

Thorium

Question 13

The results of the Rutherford experiment suggest that…

Accepted Answer

Atoms are mostly empty

Question 14

In which state matter can have different volume and shape?

Accepted Answer

Gas

Question 15

In the Rutherford experiment, most of the alpha-particles…

Accepted Answer

Went through the gold foil

Question 16

Which method should be used to separate sand from water?

Accepted Answer

Filtration

Question 17

How many pairs of electrons are shared in CO2 molecule?

Accepted Answer

Two

Question 18

Which of the following is NOT an example of physical changes?

Accepted Answer

Electrolysis of water into hydrogen and oxygen

Question 19

In which state of matter particles are fixed in their positions?

Accepted Answer

Solid

Question 20

Which of the following diagrams is CORRECT?

Accepted Answer

b

Question 21

Which of the elements is the strongest acceptor of electrons?

Accepted Answer

Chlorine

Question 22

Which element has a full outer electron orbit?

Accepted Answer

All of the above

Question 23

What is the particle, which has 1/2000 mass of the proton and equal, but opposite charge?

Accepted Answer

Electron

Question 24

Which of the statements is WRONG?

Accepted Answer

Number of protons in an atom = number of neutrons

Question 25

What are the properties of covalent substances?

Accepted Answer

They have low boiling points

Question 26

Which of the elements is the strongest donor of electrons?

Accepted Answer

Sodium

Question 27

Which of the statements is FALSE?

Accepted Answer

None of the above

Question 28

How many neutrons does potassium have?

Accepted Answer

20

Question 29

How many pairs of electrons are shared in N2 molecule?

Accepted Answer

Three

Question 30

Which of the following statements about SIMPLE distillation is FALSE?

Accepted Answer

None of the above

Atoms and Periodic Table

Questions 30

Atoms and Periodic Table

Questions 30