Your answer is: Galium
Wind is the horizontal movement of air from an area of high pressure to an area of low pressure.
Winds are caused by differences in air pressure.
These differences are caused by the uneven heating of the Earth’s surface.
Winds are named by their direction (where they originate from) and speed.
Wind speed is measured by an anemometer.
v Local Winds: winds that blow over short distances-caused by the uneven heating of Earth’s surface within a small area. They form only when large-scale winds are weak.
Ø Sea Breeze: a local wind that blows from an ocean or a lake.
§ Occurs because land heats up faster than water – The warm air expands creating an area of low pressure over the land, so the cooler more dense air moves toward the low-pressure land area.
Ø Land Breeze: a local wind that blows from the land toward water
§ Occurs because land cools faster than water – The low pressure (less dense) air is now over the water. The warm less dense air rises so the cooler air from the land moves toward that low pressure area by the water.
Based on this observation, how should the unknown substance be classified?
impure substance
solution
mixture
O pure substance
Previous Activity
1:06 PM
10/20/2019
ch
Bi
Answer:
A solution
Explanation:
Mainly because a solution is a mixture of chemically bonded elements.
phosphorescent
radioactive
photosensitive
In salt water solution, the salt is the solvent.
Answer:
280 electrons
Explanation:
The number of electrons in each energy level are determine by using following formula:
2n²
Here "n' is the energy level. we will put the energy level number in place of "n" and number of electrons will easily found.
Principle energy levels number of electrons
1 2n² = 2(1)²= 2
2 2n² = 2(2)²= 8
3 2n² = 2(3)²= 18
4 2n² = 2(4)²= 32
5 2n² = 2(5)²= 50
6 2n² = 2(6)²= 72
7 2n² = 2(7)²= 98
So the total number of electrons in first seven energy levels will be the sum of the number of electrons in each energy levels.
2+8+18+32+50+72+98 = 280 electrons