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Periodic classification-verification

Total questions: 20

Worksheet time: 13mins

Name
Class
Date
1.

The number of periods and groups in the

periodic table are______.

a)

6,16

b)

7,17

c)

8,18

d)

7,18

2.

_____ group contains the member of

halogen family.

a)

17th

b)

15th

c)

18th

d)

16th

3.

Dobereiner tried to arrange the elements with similar properties into group. So, he called the groups “_______”

Octaves

a)

Octaves

b)

Triad

c)

Metals

d)

Non-Metals

4.

Cl, I if these are the Dobereiner’s triad and the atomic masses of chlorine and the Iodine are 35,5 and 127 respectively. The atomic mass & the particular element is?

a)

Ar, 40

b)

F,19

c)

Br, 81.25

d)

At, 210

5.

The electronic configuration of an element M is 2, 8, 4. In modern periodic table, the element M is placed in

a)

4 group

b)

2 group

c)

14 group

d)

18 group

6.

An element M is in group 13th of the periodic table, the formula for its oxide is

a)

MO

b)

M2O3

c)

M3O2

d)

None

7.

Atoms of elements in group 1 have ____________.

a)

one electron in their outermost energy level

b)

two electrons in their outermost energy level

c)

seven electrons in their outermost energy level

d)

eight electrons in their outermost energy level

8.
The atoms along the staircase are called 
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
9.

The period number tells us...

a)

How many electron shells an element has

b)

How many electrons are in the most outer shell

c)

The mass number

d)

The valency

10.

Newlands could classify elements only upto

a)

Copper.

b)

Chlorine.

c)

Calcium.

d)

Chromium.

11.

According to the periodic Law of elements, the variation in properties of elements is related to their

a)

nuclear masses.

b)

atomic number.

c)

nuclear neutron-proton number ratios.

d)

atomic masses.

12.

Noble gases were included in Mendeleev's periodic table in the

a)

1st Group.

b)

7th Group.

c)

8th Group.

d)

None of these

13.
The atomic number tells you what?
a)
number of electrons
b)
number of protons
c)
number of neutrons
d)
both electrons and protons in an atom.
14.
Which is an alkali metal?
a)
Magnesium
b)
Iron
c)
Sodium
d)
Europium
15.
If an atom had the same properties as fluorine (F), it would probably be located in
a)
period 1.
b)
period 2.
c)
group 2.
d)
group 17.
16.
Atoms with similar properties are most likely located...
a)
in the same period.
b)
in the same group.
c)
in different periods.
d)
to the right and left of each other.
17.
What is the element symbol for boron? 
a)
B
b)
Bo
c)
Bn
d)
W
18.

Periodic law states that the elements are arranged according to their atomic ________ so that elements with similar chemical properties are in the same ________ and properties repeat periodically.

a)

numbers, rows

b)

masses, rows

c)

masses, column

d)

numbers, column

19.

A row on the Periodic Table of Elements

a)

family

b)

period

c)

row

d)

isotope

20.

How do you calculate the number of neutrons? *

a)

Mass = Atomic number - Neutrons

b)

Mass - Atomic number = Neutrons

c)

Atomic number = Neutrons

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