1. Name the following:
I. A species with more number of protons than electrons.
II. An atom having stable electronic configuration.
III. A molecule is formed by sharing of electrons.
IV. A metallic atom having unstable electronic configuration.
V. A subatomic particle with negligible mass.
Answers
Answer:
The total number or protons + neutrons is called the mass number (sometimes called the nucleon number in Physics). The number of protons in an atom is called the atomic number (sometimes called the proton number in Physics). Below is Lithium (Li), it has 3 protons in the nucleus and 4 neutrons.
Atoms are stable when they have eight valence electrons (two in the case of hydrogen). This is called having an octet. Only the noble gases have an octet of valence electrons naturally (two for helium, which is called a duet).
A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
An stable electronic configuration refer to an atom in which the outermost shell is complete.Whereas an unstable electronic configuration refers ta an atom in which the outermost shell is incomplete
An atom consists of three subatomic particles namely electrons, protons and neutrons. Electrons are the negative charged particles, very tiny, have negligible mass. Protons are the positively charged particles, have greater mass than an electron, and are found in the center of an atom inside the nucleus.
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