Answer:
Sodium and Magnesium
Explanation:
The elements in Groups 1 and 2 get more reactive as you go down the group.
This means that Sodium is more reactive than lithium and Magnesium is more reactive than beryllium.
On the periodic table, as you go down the group, the reactivity of an element increases. Especially with metals in group 1 and 2. Now Lithium is a metal of group 1, followed by Sodium, while Beryllium is a metal in group 2, followed by magnesium. That's how I picked the answers
Answer:
It is a finite resource. Fossil fuels such as oil, natural gas, and coal are examples of nonrenewable resources. Humans constantly draw on the reserves of these substances while the formation of new supplies takes eons. Renewable resources are the opposite: Their supply replenishes naturally or can be sustained.
Explanation:
They both ask for an amount of something
Answer:
Density = 7.11 g.cm⁻³
Solution:
Density is given as,
Density = Mass / Volume --------- (1)
Data Given;
Mass = 32 g
Volume = 16.8 mL - 12.3 mL = 4.5 mL = 4.5 cm³
Putting values in equation 1,
Density = 32 g / 4.5 cm³
Density = 7.11 g.cm⁻³
Answer:
Option (A) : Positive
Explanation:
A combustion reaction will always be associated with a change in entropy that is Positive due to the gaseous products released. Hence, there is a large positive entropy change.
