Question

An element A has 4 neutrons, 3 protons and 2 electrons. A represents




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Answer 1

Answer:

If an atom has only one proton, we know it's a hydrogen atom. An atom with two protons is always a helium atom. If scientists count four protons in an atom, they know it's a beryllium atom.

Answer 2

ATOMIC STRUCTURE -

• The smallest unit has the characteristics property of an element.
• An atom consists of electron revolving around the nucleus in fixed orbits.
• The Nucleus is a centrally located mass formed by the protons and the neutrons.
• The atomic mass of an element is given as the sum of the protons and neutrons.
• The Atomic number is equal to the number of protons or electrons.
• In the given element element,

Atomic mass = 3 + 4 = 7

Atomic number = 3

As the number of protons in the atom is greater than the number of electrons by 1. Therefore, the element is a cation.

The element with atomic number 3 and atomic mas 7 is LITHIUM-ION. $(Li^+)$