Periodicity

Question 1

electron affinity

Answer 1

The energy change when one mole of electrons is added to one mole of gaseous atoms to form one mole of gaseous ions: X(g) + e- -> X-(g)

Question 2

Electronegativity

Answer 2

The measure of attraction of a nucleus for bonding electrons

Question 3

Group

Answer 3

the vertical column of elements in the periodic table. The atoms in the elements of the group all have the same number of valence electrons.

Question 4

Period

Answer 4

The horizontal column of elements in the periodic table. The atoms in the elements of the period have the same number of shells, but an increasing number of electrons in each shell.

Question 5

Diamagnetism

Answer 5

Caused by paired electrons - Diamagnetic substances are repelled slightly by a magnetic field

Question 6

Ligands

Answer 6

Are negative ions or neutral molecules that used lone pairs of electrons to bond to a transition metal ion to form a complex ion. coordinate covalent bonds (dative binds) are formed between the ligand and the transition metal ions.

Question 7

Paramagnetism

Answer 7

Is caused by unpaired electrons - Paramagnetic substances are attracted by magnetic fields.

Question 8

Polydentate Ligand

Answer 8

Is a ligand that binds to a transition metal ion through more than one donor atom.

Question 9

Transition elements

Answer 9

The elements in the central part of the periodic table: a transition element; is an element which forms at least one stable ion with a partially filled d subshell