How is the chemical bonding within a molecule of carbon dioxide (CO2) different from the chemical bonding within a crystal of iron (Fe)?
O A. In an iron crystal, the atoms are joined by sharing electrons. In
carbon dioxide, atoms of carbon and oxygen are held together by
freely moving electrons.
B. In an iron crystal, the atoms are joined by their opposite electrical
charges. In carbon dioxide, atoms of carbon and oxygen are held
together by freely moving electrons.
C. In a carbon dioxide molecule, atoms of carbon and oxygen are
joined by their opposite electrical charges. In an iron crystal, the
atoms are held together by freely moving electrons.
D. In a carbon dioxide molecule, atoms of carbon and oxygen are
joined by sharing electrons. In an iron crystal, the atoms are held
together by freely moving electrons.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.

answer-

the statement that f(x) = |x+a| + b has exactly one x-intercept is sometimes correct.

solution-

it solely depends on b, whether the function will have one or two or zero x intercept.

this plot of the given function, f(x) = |x+a| + b will be the basic absolute value graph i.e v shape, with vertex translated to (-a, b), instead of origin.

1-   if b is zero, the graph will have exactly one x-intercept, at x= -a

2- if b is positive, the whole graph will be above the x-axis, hence it will have no x-intercepts.

3- if b is negative, the graph will be below the x-axis, hence it will have two x-intercepts.

∴ the statement is sometimes true.