Grade 9 Review

Question 1

What is an isotope?

Answer 1

Same # of p and e, diff # of n

Question 2

Do isotopes result in the same chemical reactions?

Do they have the same physical properties?

Answer 2

YES- identical chemical reactions

NO- Different physical properties, ex heavy water used for nuclear reactions

Question 3

What is a row on the periodic table called?

Answer 3

Period

Question 4

What is a column on the periodic table?

Answer 4

Group

Question 5

Are all metals solid at room temperature?

Answer 5

No, Br and Hg are liquids

Question 6

Group 1: name? reactivity? react w/ water? malleability? Colour? Which group will it react with?

Answer 6

Alkali metals, Very reactive, yes, soft metals, silvery, group 7

Question 7

Group 2: name? Where is it found? Bonded to what most often?

Answer 7

Alkaline earth metals, earth, oxygen

Question 8

Group 7: name? React with what group? Form what kind of compound? What state at room temp? Colours? What will they bond to?

Answer 8

Halogens, group 1, salt compounds, F&Cl= gasses, Br=Liquid, I=solid, F=yellowish, Cl=green, Br=brown, I=purple, bond to themselves(diatomic molecules)

Question 9

Group 8: name? Reactivity? Some uses?

Answer 9

Noble gasses, inert- no reaction(full valence level), He= lifting gas, Ar= welding