Answer:
a. 4 sig figs
b. 3 sig figs
c. 2 sig figs
Answer:
Aluminum loses three valence shell electrons to become the aluminum ion Al+3. Nitrate is a polyatomic ion with the formula NO3 -1.
False. The number of neutrons can be more or less than the number of protons.
Answer:
lever Levers
Types of lever
Levers are all around us. Hammers, axes, tongs, knives, screwdrivers, wrenches, scissors—all these things contain levers.
Explanation:
A cloth sock is dull; it doesn’t shine