1 Which statement best describes an atom?
a. An atom carries a positive charge
b. An atom carries a negative charge
c. An atom carries either positive or negative charge
d. An atom is neutral
2 What is the term given to an atom that carry a positive or negative charge?
a.atom
b.ion
c.isotope
d. molecule
3 What sub-atomic particle determines the charge of an atom?
a.electron
b.neutron
c.proton
d.all of these
4 Elements that belong to group IA in the periodic table of elements are most LIKELY TO
a. gain an electron
c. either gain or lose an electron
b.lose an electron
d.neither gain nor lose an electron
5.Which of the following is an anion?
a.An atom that gained an electron
b.An atom that lost an electron
с. An atom that gained a proton
d.An atom that lost a proton
11. Which type of compound results from the combination of a meta and non-metal
а.Ionic compounds
c.organic compounds
b.Covalent molecular compounds
d.acids and bases
12 Which type of compounds results from the combination of two nonmetallic elements?
a lonic compounds
c. organic compounds
b. Covalent molecular compounds
d.acids and bases
13 These are electrostatic forces of attraction that results from transfer of electrons from one atom to another
a.Covalent bonds
c.metallic bond
b.lonic bonds
d.Polar and Nonpolar Bonds
14 All of the following describes ionic compounds EXCEPT
a.They have crystals
c.It possesses polar and nonpolar character
b.They are hard and brittle
d.They have high melting and boiling point
15.Why are ionic compounds are good conductors of electricity?
a.lonic compounds are electrical in nature
b.electrostatic attraction between ions allows electricity to freely flow
c.Aqueous solution ionic compounds cause to dissociate ions and are free to conduct
d. Strong electrostatic attraction between crystal lattice of ionic compounds is strong which needs hgn
temperature to melt or boil these compound
16 How many particles are there in one mole of any kind of substance?
A.30 x 1023
B.30 x 10 24
C.602 x 10 23
D.6.02 x 1024
17 What is the representative particle of an ionic compounds?
A.Atoms
B.molecule
C.tons
D.formula unit
18.Why is mola concept important?
A.It is useful when converting between grams and atoms or molecules
B.It can give us convenient way to express the number
C.It can be applied to any type of particle representative
D.All of the above.
19 What is the molar mass of table salt (NaCl)?
A. 58g/mol
B. 60g/mol
C. 80/mol
D. 105g/mol
20. Naomi measured the mass of 10 marbles, pebbles and ball pen cap What will be the findings on the data she
obtained?
Table 1. Data on mass
Materials
Mass in Grams (g)
Composed of 10
pieces
Marbles
50
Pebbles
30
Ball pen cap
20
A. Different materials have different mass
B. Materials of different kind in amount color and texture
C. The same number of materials has different colors and appearance
D. The same number of materials of different kinds has different mass

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