GRADE 9 SCIENCE EXAM QUESTIONS AND
ANSWERS WELL ILLUSTRATED.
1. Protons: Positive Charge
2. Neutrons: Neutral Charge
3. Electrons: Negative Charge
4. Chemical Symbol: Abbrieviation of the name of elements
5. Chemical Formula: Combination of symbols that represents a particular com-
pound. it indicates which elements are present
6. Ionic compound: Chemical compound where ions are held together in an ionic
bond
7. Ionic Compound Formula: Write symbols putting metal first, write the charges
abocve each, criss cross, GCF
8. Physical Property: Physical characteristics of something, ex colour tecture den-
sity do not affect the ability of something to change
9. Chemical Property: Involves a change in form, makes new substance, can not
be irreversed
10. Ionic Bonding: Metal loses electrons to form a positive ion, force of attraction
between ions that form the bond
11. Particles: All matter is made up of tiny particles, made up of different particles
12. Identical: All particles of one substance are the same
13. Spaces: Particles have spaces between them
14. Attraction: Attractive forces exist between the particles the closer they are
better attraction
15. Motion: particles are always moving
16. Solid: Close, only vibrate
17. Liquid: Slide past eachother further apart, weaker
18. Gas: Weak, collide with eachother
19. Atomic Number: number of protons in an atom
20. Atomic Mass: Number of protons and neutrons in an atom
21. Ion Charge: The electric charge that an atom takes on when it loses or gains
electrons
22. Period: Horizontal rows
23. Group: Vertical columns
24. Alkali Metals: Soft extremely reactive metals, react with cold water +1 ions
25. Alkaline Earth Metals: Soft reactive materials, compounds are major part of
earth's crust +2 ions
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ANSWERS WELL ILLUSTRATED.
1. Protons: Positive Charge
2. Neutrons: Neutral Charge
3. Electrons: Negative Charge
4. Chemical Symbol: Abbrieviation of the name of elements
5. Chemical Formula: Combination of symbols that represents a particular com-
pound. it indicates which elements are present
6. Ionic compound: Chemical compound where ions are held together in an ionic
bond
7. Ionic Compound Formula: Write symbols putting metal first, write the charges
abocve each, criss cross, GCF
8. Physical Property: Physical characteristics of something, ex colour tecture den-
sity do not affect the ability of something to change
9. Chemical Property: Involves a change in form, makes new substance, can not
be irreversed
10. Ionic Bonding: Metal loses electrons to form a positive ion, force of attraction
between ions that form the bond
11. Particles: All matter is made up of tiny particles, made up of different particles
12. Identical: All particles of one substance are the same
13. Spaces: Particles have spaces between them
14. Attraction: Attractive forces exist between the particles the closer they are
better attraction
15. Motion: particles are always moving
16. Solid: Close, only vibrate
17. Liquid: Slide past eachother further apart, weaker
18. Gas: Weak, collide with eachother
19. Atomic Number: number of protons in an atom
20. Atomic Mass: Number of protons and neutrons in an atom
21. Ion Charge: The electric charge that an atom takes on when it loses or gains
electrons
22. Period: Horizontal rows
23. Group: Vertical columns
24. Alkali Metals: Soft extremely reactive metals, react with cold water +1 ions
25. Alkaline Earth Metals: Soft reactive materials, compounds are major part of
earth's crust +2 ions
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