Chem pp2

What do elements in the same period have in common?

They have the same number of occupied electron shells.

What is the trend of atomic radius as you move across a period?

Atomic radius decreases.

What causes the atomic radius to increase as you move down a group?

The number of electron shells increases, placing valence electrons further from the nucleus.

What is electronegativity?

A measure of an atom's ability to attract electrons towards itself in a chemical bond.

How does electronegativity change across a period?

It increases.

Define first ionization energy.

The energy required to remove the most loosely bound electron from a neutral atom.

How does first ionization energy change as you move down a group?

It decreases.

What is the general trend of metallic character across a period?

It decreases.

What is the reactivity trend for alkali metals as you go down the group?

Reactivity increases.

What characterizes a non-metal's reactivity as you move down a group?

Reactivity decreases.

What is unique about noble gases regarding their reactivity?

They are very unreactive due to having a full outer shell of electrons.

What is the maximum number of electrons the first shell can hold?

2 electrons.

In the Schrödinger model, what are the subshell designations?

s, p, d, and f.

How is subshell electron configuration notated?

Using the shell number, subshell letter, and a superscript to indicate the number of electrons.

What does condensed subshell electron configuration start with?

The symbol of the previous noble gas in brackets.

What does the formula 2n² represent?

The maximum number of electrons that each shell can hold, where 'n' is the shell number.

What is the general trend of non-metallic character across a period?

It increases.

How does ionization energy generally trend across a period?

It increases.

What happens to the effective nuclear charge across a period?

It increases.

What is indicated by the arrangement of elements in groups?

Similar chemical properties due to the same number of valence electrons.