What is formed when atoms join together with a covalent bond? a. an ion b. a molecule c. a neutral atomd. a noble gas

B. a molecule

Explanation: Covalent bond is formed by the sharing of electrons between atoms.

is a molecule formed by the sharing of electrons between two hydrogen atoms.

An ion is formed by losing or gaining electrons.

A neutral atom is one which contains equal number of protons and neutrons.

A noble gas is one which contains completely filled orbitals.

answer: the figure is attached herewith.

step-by-step explanation:   we are given to sketch a unit circle and label the terminal points corresponding to

in the attached figure, we have drawn a unit circle, with centre at o(0,0) and radius 1 unit. we have labelled the points a, b, c, d and e corresponding to the angles below

∠aox = 60°,

∠box = 120°,

∠cox = 180°,

∠dox = 240°,

∠eox = 300°.

and the coordinates are a(0.5,1), b(-0.5,1), c(-1,0), d(-0.5,-1) and e(0.5,-1).

thus, the answer is complete.

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.