Which one of the following is not one of the postulates of Dalton's atomic theory?

a) Atoms are composed of protons, neutrons, and electrons.

b) All atoms of a given element are identical; the atoms of different elements are different and have different properties.

c) Atoms of an element are not changed into different types of atoms by chemical reactions: atoms are neither created nor destroyed in chemical reactions.

d) Compounds are formed when atoms of more than one element combine; a given compound always has the same relative number and kind of atoms.

e) Each element is composed of extremely small particles called atoms.

When a metal and a nonmetal react, the __________tends to lose electrons and the __________ tends to gain electrons.

A) metal, metal

B) nonmetal, nonmetal

C) metal, nonmetal

D) nonmetal, metal

Of the choices below, which one is not an ionic compound?

a) PCl5

b) CrCl6

c) RbCl

d) PbCl2

e) NaCl

Which of the following compounds would you expect to be ionic and which molecular (covalent)?

(a) LiBr

(b) SiCl$_{4}$

(c ) BF$_{3}$

(d) CaO

You will encounter many words in this reading that you do not know. Sometimes these words are cognates, which you can get after reading them alone. Look at the following cognates from the reading and write the corresponding English word.

superiores ____________

Give the chemical formula for each of the following ionic compounds: barium bromate

Give the chemical formula for each of the following ionic compounds: zinc nitrate.

Give the chemical formula for each of the following ionic compounds: sodium phosphate.

Name the following compounds. (a) $\mathrm{HBrO}_3$ (b) KIO (c) $\mathrm{NaClO}_2$ (d) $\mathrm{NaBrO}_4$

Name the following ionic compounds:

$$Sr(OH)_2$$

Name the following ionic compounds:

$$KCN$$

Give the names and charges of the cation and anion in each of the following compounds:

$$PbCO_3$$

Give the names and charges of the cation and anion in each of the following compounds:

$$Co(OH)_2$$

Give the names and charges of the cation and anion in each of the following compounds:

$$\mathrm { Al } \left( \mathrm { ClO } _ { 3 } \right) _ { 3 }$$