Remember that the:
1. Vertical columns are groups and families
2. Horizontal columns are periods
3. Period 1 has 2 e-, 2 has 8 e-, 3 has 8 e-, and 4 has 18 e-
3.The number on top of the groups/families shows what group it is on (ex. 1A, 2A, 3B, 4B, etc) and the number on top of that indicates the number of the same thing (what group it is)
⇒ ex. 1A has 1 val e-. 2A has 2 val e-. 3A has 3 val e- ( and rest goes up until 8A). Note: I skipped the transitions metals since they don't have accurate amount of val e-.
4. Know which is the mass number, atomic number, symbol, or name.
5. Where the metals, non- metals, and metalloids are located.
6. Elements on the same groups have similar properties.
7. The first group is Akali Metals and are very unstable and very reactive
8. Second group is Akaline Earth Metals
9. The middle, groups 3-12 are Transition Metal
10. Group 13 is the Boron Family.
11. Group 14 is the Carbon Family
12. Group 15 is the Nitrogen Family
13. Group 16 is the Oxygen Family.
14. Group 17 is the Halogen, salt families
15. Group 18 is the Noble Gases, and are very stable and not reactive.
I hope this helps. :)
[H+][OH-] = 1x10-14 = Kw (Memorize this relationship)
(2.70x10-2)[OH-] = 1x10-14
[OH-] = 1x10-14/2.70x10-2
[OH-] = 3.70x10-13 M (assuming you ignore the autoionization of H2O)
Answer: A. An early form of chemistry that people used to try to turn metal
into gold.
Explanation:
Alchemy is indeed an early form of chemistry in which people try to turn metal into gold.
Sedimentary Rocks.
The other types of rocks are igneous, formed by magma, and metamorphic, formed from other rocks changed through heat and pressure.
D) 60°C
Explanation:
The molecules of Nitrogen gas will have the highest average kinetic energy when their temperature is the highest.
According the kinetic molecular theory, the temperature of gases is directly proportional to their average kinetic energy.
The higher the temperature, the more kinetic energy they possess.
To find out the highest temperature from the given options, we need to solve and express all the given options in a single unit of temperature.
K = 273 + °C
Let us convert all to Kelvin;
-40°C;
K = 273 + (-40) = 233K
60°C;
K = 273 + 60 = 333K
We can see that 60°C has the highest temperature in kelvin and this will furnish the gas with the greatest average kinetic energy.
learn more:
kinetic molecular theory brainly.com/question/12362857
#learnwithBrainly
