Answer:
Option B
Explanation:
For the problem in question 12, option B is the correct choice. It rightly expresses how electrons will fill the third energy level of aluminum.
Aluminum is an element with 13 electrons. It has 3 energy levels.
The shell notation is given as 2 8 3
Sublevel notation = 1s² 2s² 2p⁶ 3s² 3p¹
The third energy level is given as 3s² 3p¹
We can represent it as: ⇅ ↑
3s² 3p¹
Answer: conduction
Explanation:
the heat passes out of the stove and into your hand. So is holding an ice cube – the heat is conducted out of your hand, and into the ice cube (that’s why your hand feels cold).
Answer:
8.0 g
Explanation:
To convert moles to grams, you need to use the molar mass. The molar mass of sulfur is 32.06. The molar mass is the atomic mass of the atom.
(0.25 mol) × (32.06 g/mol) = 8.015 g
Round for significant figures.
8.015 g ≈ 8.0 g
Answer: When you put a hot object in contact with a cold one it heat will flow from the warmer to the cooler. and as a result the warmer one will be usually cool down and the cooler one will usually warm up. Eventually, they will reach the same temperature and heat flow will stop.
Explanation: Hope this helps
To accurately measure the final volume of a solution in a burette, it is important that you read of the measurement in the lower meniscus like for water and for substances like mercury you read it on the upper meniscus. This is the standard way of reading volumes in laboratory apparatus. Also, it should be that the apparatus standing vertically in a plain surface.
