Draw the geometric atomic structure of following element, showing clearly the {a} number of protons {b} number of electrons {c} number of neutrons.

${}_9{}^{}\mathrm{F}$¹⁹

Draw the geometric atomic structure of ${}_9{}^{19}\mathrm{F}$ , showing clearly number of neutrons, number of protons and number of electrons.

Draw the geometric atomic structure of ${}_2{}^4\mathrm{He}$ , showing clearly number of neutrons, number of protons and number of electrons.

${}_1{}^2\mathrm{H}$ is an isotope of hydrogen. Draw its structure showing clearly the number of protons, neutrons and electrons. Also, write the common name.

An element X has mass number 23 and atomic number 11.

a) State the number of protons in its nucleus

b) State the number of neutrons in its nucleus

c) State the number of electrons revolving around the nucleus.

d) Draw the atomic structure.

Which of the following are true for an element?

(i) Atomic number= number of protons + number of electrons

(ii) Mass number= number of protons + number of neutrons

(iii) Atomic number= number of protons = number of neutrons

(iv) Atomic number= number of protons = number of electrons