Answer:
An increase in temperature lead to more effective collisions between reactant particles
increase in the rate of a chemical reaction because the number of molecules with sufficient energy to react increases.
Explanation:
They want to know if we can colonize Mars since Earth's resources are being more and more limited.
Answer:
1) Squat down low and cover your head. (if no shelters are present)
2) 1 gallon per person per day
<u>Answer:</u> This element has +2 charge on it.
<u>Explanation:</u>
An ion is formed when an atom looses or gains electrons.
- When an atom looses electrons, it leads to the formation of positive ion known as cation.
- When an atom gains electrons, it leads to the formation of negative ion known as anion.
Magnesium is the 12th element of the periodic table having electronic configuration of 
This element will loose 2 electrons to attain stable electronic configuration and leads to the formation of a cation having formula 
Hence, this element has +2 charge on it.