Question

Fill in the blanks.
(a) An atom consists of _______________, ____________ and _____________.
(b) _____________ are negatively charged particles, while ____________ are positively charged and ____________are ____________.
(c) The ____________ at the center of the atom has ___________ and ____________.
(d) The paths of the negatively charged particles in an atom are called ______________.
(e) Each _____________ is a unit of negative electricity.
(f) In an atom, the _____________ and ____________ are equal in number.
(g) The ___________ and ____________ together make up most of the mass of an atom.
(h) The _____________ of an ____________ is negligible.
(i) The atom as a whole is electrically ______________.
(j) An atom with a shortage or surplus of _____________ is called an ____________.

Answer 1

(a) An atom consists of electrons, protons and neutrons.

(b) Electrons are negatively charged particles, while protons are positively charged and neutrons are neutral.

(c) The nucleus at the center of the atom has protons and neutrons.

(d) The paths of the negatively charged particles in an atom are called orbit.

(e) Each electron is a unit of negative electricity.

(f) In an atom, the electrons and protons are equal in number.

(g) The protons and neutrons together make up most of the mass of an atom.

(h) The mass of an electron is negligible.

(i) The atom as a whole is electrically neutral.

(j) An atom with a shortage or surplus of electrons is called an ion.