Question

In an element, the number of protons, electrons and neutrons are $1$, $0$, $1$ respectively. Identify the element.

• A. $D^{+}$
• B. $H^{+}$
• C. $He$
• D. ${Li}^{+}$

Answer 1

Answer: (A)

$D^{+}$

The element has $1$ proton and $1$ neutron. Thus it is deuterium (D). However it has no electron so it is positively charged and represented as $D^{+}$. Thus correct answer is option A.