Which one of the following is an example for a metal?

(a)

Iron

(b)

Oxygen

(c)

Helium

(d)

Water

An element which is always lustrous, malleable and ductile is _______.

(a)

non-meta

(b)

metal

(c)

metalloid

(d)

gas

The graphite refill used is pencil is made of element called ___________

(a)

graphit

(b)

carbon

(c)

silicon

(d)

sodium

The smallest unit of an element is _____________

(a)

atom

(b)

molecule

(c)

compound

(d)

none

The most abundant type of atom is the universe is _____________

(a)

Helium

(b)

Hydrogen

(c)

Argon

(d)

Argon

The smallest particle of matter that can exist by itself is ______.

A PHP Error was encountered

Severity: Warning

Message: A non-numeric value encountered

Filename: material/details.php

Line Number: 1002

()

atom

A compound containing one atom of carbon and two atoms of oxygen is_______.

A PHP Error was encountered

Severity: Warning

Message: A non-numeric value encountered

Filename: material/details.php

Line Number: 1002

()

CO₂

________is the only non-metal conducts electricity.

A PHP Error was encountered

Severity: Warning

Message: A non-numeric value encountered

Filename: material/details.php

Line Number: 1002

()

Graphite

Elements are made up of  ________ kinds of atoms.

A PHP Error was encountered

Severity: Warning

Message: A non-numeric value encountered

Filename: material/details.php

Line Number: 1002

()

only one

________of some elements are derived from Latin or Greek names of the elements.

A PHP Error was encountered

Severity: Warning

Message: A non-numeric value encountered

Filename: material/details.php

Line Number: 1002

()

The Symbol

The name copper was taken from ___________

A PHP Error was encountered

Severity: Warning

Message: A non-numeric value encountered

Filename: material/details.php

Line Number: 1002

()

cypress

The first letter of a symbol of an element is always written as a__________ letter and the second letter as a _________ letter

A PHP Error was encountered

Severity: Warning

Message: A non-numeric value encountered

Filename: material/details.php

Line Number: 1002

()

capital, small

There are __________ hydrogen atoms in water molecule

A PHP Error was encountered

Severity: Warning

Message: A non-numeric value encountered

Filename: material/details.php

Line Number: 1002

()

2

There is ___________ oxygen atom is water molecule

A PHP Error was encountered

Severity: Warning

Message: A non-numeric value encountered

Filename: material/details.php

Line Number: 1002

()

1

______________ is the total number atoms present in one molecule of an element, compound or a substance.

A PHP Error was encountered

Severity: Warning

Message: A non-numeric value encountered

Filename: material/details.php

Line Number: 1002

()

Atomicity

Metals are usually solids or gases at room temperature.

(a) True

(b) False

Non-metals are non-malleable.

(a) True

(b) False

Non-metals are usually, good conductors of heat and electricity.

(a) True

(b) False

Sodium chloride is used as table salt and for flavoring and preserving food.

(a) True

(b) False

Lead is also known as plumbum.

(a) True

(b) False

CO₂

(1)

triatomic molecule

Sulphur

(2)

dull and soft

Element

(3)

Mobile phones

Gallium

(4)

Robert Boyle

Non-metals

(5)

Polyatomic molecule