Question

4. Number of electrons in an atom is equal to the atomic number.
give reason
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Answer 1

Answer:

Answer: For a neutral atom, the atomic number is the number of electrons. Atomic number is the number of protons in an atom, protons have a positive charge, so in order for an atom to be neutral it must have the same number of electrons as it has protons. ... Atoms have electrons which are negatively charged.

Answer 2

Answer:

• The nucleus of an atom has a positive charge, while the electrons that surround it have a negative charge. We also know that protons and neutrons make up the atomic nucleus.
• The protons and neutrons are contained within the nucleus, a small, dense area at the atom's core.
• Neutrons and protons are known to exist within the nucleus. The nucleons are made up of neutrons and protons.

Explanation:

• We know that the atom has a positively charged nucleus at its centre and negatively charged electrons that orbit the nucleus in cycling routes called orbitals. The nucleus and electrons are held together by electrostatic attraction.
• The atom's mass is concentrated in the nucleus, with a little contribution from the electron cloud.
• The mass number is the sum of the protons and neutrons in the nucleus.
• The atomic number refers to the number of protons in the nucleus.
• The mass number of an element E is represented by the top left number, whereas the atomic number is represented by the bottom left number.
• The letter A stands for a large number.
• Atomic numbers are represented by the letter Z.

The number of protons in an element is determined by its atomic number.

The number of protons in an atom is equal to its atomic number.

The number of protons = the number of electrons present.

The number of protons = the number of electrons.

As a result, an atom's atomic number is equal to the total number of electrons and protons in the atom.