أوراق عمل Review chapter 2 مع الحل العلوم منهج انجليزي الصف الثامن
Term 1 Final Revision
Chapter 2 Final Questions
Multiple Choice
. The smallest particle into which an element can be divided and still be the same substance
A- electron
B- proton
C. atorn
D- molecule
2. Electrons are particles that
A- help make up the nucleus and have no charge
B- help make up the nucleus and are positively charged
C. located outside of the nucleus and are negatively charged
D- are located outside Of the nucleus and have no charge
If you found a Carbon 13 atom, you would know tha
A. has 13 protonS
B- it has 13 electrons
C- it has 13 neutrons
D- it has 7 neutrons
4. What particles make up the nucleus
A- electrons and neutrons
B. protons and neutrons
C- electrons and protons
D- electrons, protons, and neutrons
5. Neutrons are particles that
A. help make up the nucleus and have no charge
B. help make up the nucleus and are positively charged
C. are located outside of the nucleus and are negatively charged
D. are located outside of the nucleus and have no charge
. The mass number minus the atomic number is equal to the number of
A- protons and neutrons
B- protons
C- protons and electrons
. Which of the following is NOT found on the periodic table
A- the atomic number of each element
B- the symbol of each element
C. Che density of each element
D- the atomic mass of each element
8. An atom of gold with 79 protons, 79 electrons, and 118 neutrons would have amass number of
A- 39
B- 158
D- 276
9. Most metals are good conductors of
A- thermal energy
B- electric current
C- light energy
D. (a) and (b)
. One property of most non -metals is that they are
A. boor conductors of electric current
B. shiny
C. flattened when hit with a hammer
D. solid at room temperature
. The first shell in an atomic drawing can hold a maximum of electrons
. Argon has valence electrons
. Selenium is found in group
14. Potassium has—neutrons
B- 38
D- 58
15. The symbol for calcium is
. When an atom loses an electron, it becomes a
Poisitive ion
negative ion
neutral ion
neutral atom
17. An ionic bond is the attraction between
similarly charged ions
oppositely charged ions
neutral ions
neutral atoms
.A chemical bond formed when two atoms share electrons is called a (n)
A- ionic bond
B. eovalent bond
C- polyatomic bond
D- crystal bond
19. What is a double bond
A- a bond between two atoms
B- one pair of electrons shared two atoms
C. Ovo pairs of electrons shared between two atoms
D- two pairs of electrons shared between four atoms
20. Most metals are good conductors of
A- thermal energy
B- electric current
C- light energy
D. (a) and (b)