8th Grade Science 2 Question Preview (ID: 39934)


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What element has properties similar to Lithium?
a) Cesium
b) Beryllium
c) Carbon
d) Calcium

Where are the most reactive elements located?
a) Group 1-Alkali Metals
b) Group 2-Alkaline Earth Metals
c) Halogens
d) Nobel gases

Where are the least reactive elements located at?
a) Alkali metals
b) Halogens
c) Nobel gases
d) Alkaline Earth Metals

What group of NONMETALS are the most reactive?
a) Alkaline Earth Metals
b) Alkali Metals
c) Halogens
d) Nobel gases

Mass is not created or destroyed
a) Law of Compounds
b) Law of Gravity
c) Law of Conservation of Mass
d)

Why do we balance equations?
a) Torture
b) Because of elements
c) Law of Conservation of Mass
d)

If I reacted 2 g of H and 3 g of Cl to form HCl. How much HCl is produced?
a) 2 g
b) 5 g
c) 6 g
d) 3 g

If I reacted H and Cl to form HCl. What is/are the reactants?
a) HCl
b) H and Cl
c) H
d) Cl

If I reacted H and Cl to form HCl. What is/are the products?
a) HCl
b) H
c) Cl
d) H and Cl

Which equation supports the Law of Conservation of Mass?
a) 2H + O yields HO
b) 2H + 2O yields 2HO
c) 2H + O yields 2HO
d)

What do the columns/groups/families tell you?
a) How many shells/orbitals
b) How many valence electrons
c)
d)

How many valence electrons does Chlorine have?
a) 3
b) 2
c) 7
d) 17

Elements on the left side of the periodic table
a) nonmetals
b) metals
c) metalloids
d)

Elements on the right side of the periodic table
a) Nonmetals
b) metals
c) metalloids
d)

Boron is
a) Metal
b) Metalloid
c) Non-metal
d)

I want to see if chewing gum increased test scores. What is the independent variable?
a) Students
b) Chewing gum
c) Test scores
d)

I want to see if chewing gum increased test scores. What is the dependent variable?
a) Test scores
b) Chewing gum
c) Students
d)

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