Checkpoint 4 CHEM 1101 memorization

What is the difference between a simple ion and a polyatomic ion?

A simple ion contains one atom, a polyatomic contains two or more atoms.

Which has the smallest atomic radius: Li, Na, Be, or Mg?

Be

Which of these elements has the great known electron affinity: K, Br, As, Ar, or I?

Br (not Ar because it is already a noble gas)

Which has the highest first ionization energy: K, Br, Cl, or S?

Cl

most electronegative elements

F>O> N> Cl *almost all covalent bonds to these elements should be polar

For silicon atoms, which IE value will show an exceptionally large increase over the preceding IE Value: IE2, IE3, IE5, or IE6

IE5 because that is when you remove electrons from the inner shell

Which of these elements has the smallest first IE: Cl, Na, Be, K, or As?

K

Arrange the following atoms in order of increasing atomic radius: Na, Cl, S, Ne, F

Ne<F<Cl<S<Na

Explain why so much more energy is required to remove the third electron from Ca, as compared to the removal of the first and second electrons.

The third electron is in the inner shell, requiring more energy for it to be removed.

What is the electron configuration of Ni2+?

[Ar] 3d8

octa-

eight

penta-

five

tetra-

four

What elements tend to form ionic compounds?

metals and nonmetals

nona-

nine

C-H bonds are:

non-polar covalent bonds

What elements tend to form molecular compounds?

nonmetals

mono-

one

hepta-

seven

hexa-

six

deca-

ten

tri-

three

What type of element can form two or more ions each with a different charge?

transition metals

di-

two