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 ______.

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atom

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

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CO₂

________is the only non-metal conducts electricity.

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Graphite

Elements are made up of  ________ kinds of atoms.

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only one

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

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The Symbol

The name copper was taken from ___________

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cypress

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

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capital, small

There are __________ hydrogen atoms in water molecule

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2

There is ___________ oxygen atom is water molecule

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1

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

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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)

Robert Boyle

Element

(3)

Polyatomic molecule

Gallium

(4)

dull and soft

Non-metals

(5)

Mobile phones