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2. Basic Chemistry: Atom, Molecule, Ion

Total questions: 25

Worksheet time: 19mins

Name
Class
Date
1.

Which are called subatomic particles?

a)

electron

b)

isotop

c)

proton

d)

neutron

e)

atom

2.

Apa yang dimaksud dengan nomor massa?

a)

jumlah proton + jumlah elektron

b)

jumlah elektron + jumlah neutron

c)

jumlah neutron + jumlah proton

d)

jumlah elektron + nomor atom

3.

Mana yang termasuk dalam molekul?

a)

H2SO4

b)

Cl2

c)

Hg

d)

CO2

e)

O2-

4.

Identify which are the following as empirical formula?

a)

H2O2

b)

NaCl

c)

C6H12O6

d)

HNO3

e)

MgCl2

5.

Which are element of organic compound?

a)

Na

b)

S

c)

Cl

d)

C

e)

H

6.

Which are the following element of noble gases?

a)

Ar

b)

Kr

c)

H

d)

F

e)

Ne

7.

Strontium-90 occurs in fallout from nuclear testing. It can accumulate in bone marrow and may cause leukemia and bone cancer. Give the number of protons, neutrons, and electrons in the atom symbolized by 3890Sr_{38}^{90}Sr .

(a)  

8.

Write the symbol for the silver atom (Z = 47) that has 61 neutrons.

a)

47 61Ag_{47\ }^{61}Ag

b)

6114Ag_{61}^{14}Ag

c)

47108Ag_{47}^{108}Ag

d)

61108Ag_{61}^{108}Ag

e)

6147Ag_{61}^{47}Ag

9.

How many electrons are present in Bi3+ ions?

a)

34

b)

15

c)

22

d)

80

e)

there's no correct answer

10.

What is the name of MgI2.

(a)  

11.

Protium, deuterium and tritium are ..........

a)

Molecules

b)

Mixtures

c)

Compounds

d)

Nucleon

e)

Isotopes

12.

Give IUPAC nomenclature for salt, Na2SO3

a)

Sodium sulphate

b)

Sodium sulphite

c)

Sodium thiosuiphate

d)

Sodium thiosulphite

e)

Sodium polysulfide

13.

Argon (Z=18). What is the meaning of the Z symbol?

a)

Argon is element located at group 18

b)

Neutron number for Argon is 18

c)

Location Argon is 18th at periodic table

d)

Argon has 18 proton number

e)

Argon has 18 isotopes

14.

Copper (II) nitrate is an inorganic compound that forms a blue crystalline solid. Determine species anion and cation are present in this compound.

a)

Co2+ & NO3-

b)

Cu+ & NO2-

c)

Cu2+ & NO2-

d)

Cu2+ & NO3-

e)

Co2+ & NO2-

15.

What is isotopes?

a)

same proton number but different electron number

b)

same nucleon number but different proton number

c)

same proton number but different nucleon number

d)

same neutron number but different nucleon number

e)

same proton and electron number

16.

In order for an atom to be neutral what has to be true?

a)
Number of protons equals number of neutrons
b)
Number of protons equals number of electrons
c)
Number of electrons equals number of protons
d)
Number of neutrons equals number of electrons
e)

Number of neutrons more than number of electrons

17.

Most of the mass in an atom is made up of .....................

a)

protons and electrons

b)

protons and neutrons

c)

neutrons and electrons

d)

electrons and quarks

e)

protons only

18.

The atomic number represents................

a)
number of protons
b)
number of electrons
c)
mass number
d)
number of neutrons
e)
period in the periodic table
19.

All atoms of the same element have ....................

a)
unique chemical properties
b)
varying atomic masses
c)
opposite charges in their nucleus
d)
different number of electrons
e)
the same number of protons in their nucleus
20.

Sodium has an atomic number of 11, how many protons does this atom have?

a)

22

b)
12
c)
11
d)

2

e)
10
21.

The following element key shows how many protons?

a)

8

b)

16

c)

15,999

d)

6

e)

10

22.

The scientist responsible for "discovering" the nucleus is ...................

a)

John Dalton

b)

Niels Bohr

c)
Ernest Rutherford
d)

Erwin Schrödinger

e)

J. J. Thomson

23.

How many different elements are present in CO2?

a)
2
b)
5
c)
4
d)
3
e)
1
24.

how is cations form?

a)
By absorbing protons
b)
By forming covalent bonds
c)
By losing electrons
d)
By sharing electrons
e)
By gaining electrons
25.

Give the formula for perchloric acid.

a)
HClO
b)

HClO2

c)
HCl
d)

HClO3

e)

HClO4

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