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

(a)

Iron

(b)

Oxygen

(c)

Helium

(d)

Water

Which of the following is a short and scientific way of representing one molecule of an element or compound?

(a)

Mathematical formula

(b)

Chemical formula

(c)

Mathematical symbol

(d)

Chemical symbol

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 most abundant type of atom is the universe is _____________

(a)

Helium

(b)

Hydrogen

(c)

Argon

(d)

Argon

_____________ is a substance that is made up of three oxygen atoms chemically combined.

(a)

Oxygen

(b)

Hydrogen

(c)

Ozone

(d)

CO₂

Amolecule which contains only one atom is called _________ molecule

(a)

monoatomic

(b)

diatomic

(c)

triatomic

(d)

none

________________ is the first scientist who used the term element.

(a)

Newton

(b)

Einstein

(c)

Robert Boyle

(d)

Robert hook

The common salt consisting elements. of sodium and _________

(a)

Oxygen

(b)

Chlorine

(c)

Carbon

(d)

Hydrogen

___________ exhibit the properties of metals and non-metals.

(a)

Metalloids

(b)

Copper

(c)

Carbon

(d)

Nickle