If an atom contains one electron and one proton, what charge will it carry?

Who led to the discovery of canal rays?

Identify the difference between particles of each given pair.

(I)  ${}^6\mathrm{Li}$ and ${}^7\mathrm{Li}$
(II)  ${}^{32} \mathrm{S}$ and ${{}^{32} \mathrm{S}}^{2-}$
(III)  ${{}^{39} \mathrm{K}}^{+}$ and ${{}^{40}\mathrm{Ca}}^{2+}$

Study the given table carefully and select the incorrect statement(s).

I. $S$ and $T$ are cations.
II. $R$ is the lightest element while $U$ is the heaviest element.
Ill. $P$ is a noble gas.
IV. $Q$ and $U$ are anions.

A certain amount of gas is enclosed in a discharge tube. The bulb in the arrangement given below can be made to glow when:

Electrons and protons are represented as?

Three invisible radiations $\mathrm{X}, \mathrm{Y}$ and $Z$ are passed through an electric field. $\mathrm{X}$ goes straight, $\mathrm{Y}$ deviates towards the positive end while $\mathrm{Z}$ deviates towards the negative end. The particles present in $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ and the $\frac{\mathrm{e}}{\mathrm{m}}$ ratio for $\mathrm{X}$ are

Description of a few atoms is given in the table.

Identify a cation, an anion and a pair of isotopes from the given table:

Which of the following is true for mass and charge of electron?

Which of the following is true for mass and charge of proton?

What are canal rays?

Which of the given pairs of atoms contain(s) the same number of neutrons?

I ${}_{48}{}^{114}\mathrm{Cd}$ and ${}_{50}{}^{119}\mathrm{Sn}$

II ${}_{27}{}^{59}\mathrm{Co}$ and ${}_{28}{}^{59}\mathrm{Ni}$

III ${}_{55}{}^{133}\mathrm{Cs}$ and ${}_{54}{}^{132}\mathrm{Xe}$

IV ${}_{29}{}^{63}\mathrm{Cu}$ and ${}_{29}{}^{65}\mathrm{Cu}$