Which scenario would cause a covalent bond to form?
Choose 1
Choose 1

(Choice A)
A

Two atoms share electrons so they can fill their outer shells

(Choice B)
B

One atom loses one or more electrons and the other atom gains one or more electrons

(Choice C)
C

The constant motion of electrons and the creation of charge imbalances bonds two molecules together

(Choice D)
D

A hydrogen atom with a slight positive charge is attracted to a negative charge of another molecule or atom

A) Two atoms share electrons so they can fill their outer shells

Explanation: A covalent bond is a type of bond formed by sharing equal number of electrons between two non-metal atoms so that both of them can attain a stable octet or duplet structure of noble gases.

In covalent bonding, there is no loss or gain of electrons between atoms. For example, the formation of chlorine molecule, chlorine atom has seven electrons in its outermost shell, remaining one electron to attain an octet structure of noble gases. Two chlorine atoms share one pair of electron, each chlorine atom donating one electron to form a pair so that each atom in the chlorine molecule attains an octet structure..

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.