The basic unit of matter is ______.

(a)

Element

(b)

Atom

(c)

Molecule

(d)

Electron

_______ is positively charged.

(a)

Proton

(b)

Electron

(c)

Molecule

(d)

Neutron

Nucleons comprises of _______.

(a)

Protons and electrons

(b)

Neutrons and electrons

(c)

Protons and neutrons

(d)

Neutrons and Positron

____________ is made up of two or more atoms

(a)

Atoms

(b)

Molecule

(c)

Compound

(d)

None

Whose theory does not propose anything about the positive and negative charges of an atoms.

(a)

J.J. Thomson

(b)

Dalton

(c)

Rutherford

(d)

Bohr

One Nanometre is equal to _____________

(a)

10⁸ m

(b)

10^-9 m

(c)

10^-5 m

(d)

10⁹ m

Protons and neutrons are called __________

(a)

atom

(b)

nucleons

(c)

positive charge

(d)

negative charge

Electron was discovered by ___________

(a)

J.J. Thomson

(b)

Chadwick

(c)

Goldstein

(d)

Delton

The positively charged particle is _________

(a)

electron

(b)

proton

(c)

neutronnone

(d)

none

Atomic number is represented by the letter __________

(a)

A

(b)

N

(c)

P

(d)

Z