The spectrum of $He$ is expected to be similar to

The element $Uuq$ (Ununquadium,atomic number $Z = 114$) contains $12.8 \%$ more neutrons compared to protons. What is the approximate mass number of it?

When $\mathop a\limits^x U$ is converted into $\mathop b\limits^y P$,which of the following represents the correct decrease in the number of neutrons?

The number of protons,neutrons,and electrons in the element $_{89}X^{231}$ are respectively:

The isobars are atoms with the same number of

An atom is composed of protons,neutrons,and electrons. If the mass of a neutron is halved and the mass of an electron is doubled,what will be the change in the mass of the nucleus of $_6C^{12}$?