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Vera_Pavlovna [14]
3 years ago
11

How to remember the first 20 elements of the periodic table?

Chemistry
2 answers:
REY [17]3 years ago
6 0

The way the brain works is that you learn from repetition, the more you do something the better you get at it. So the more you review the first 20 elements on the periodic table, the more often you'll be able to remember it until you're about to recount them without hardly thinking of it.

My advice to you is to grab some pieces of paper. Cut them up into sixths until you have twenty of them, then write down on each smaller piece of paper the numbers 1 up to 20. Then on the other side of the paper, write down the element. Do this in accordance to their position on the periodic table. Then spend some time guessing as to what element is on the other side of the numbered paper. You'll start guessing, "the first element is Hydrogen. The second element is Helium." And so on. Rinse and repeat until you're able to guess the element depending on its placement on the periodic table. Good luck!

EastWind [94]3 years ago
5 0

Happy. – H Hydrogen

Henry – He Helium

Lives – Li Lithium

Beside – Be Beryllium

Born – B Boron

Cottage – C Carbon

Near – N Nitrogen

Our – O Oxygen

Friend – F Fluorine.

Nelly – Ne Neon

Nancy – Na Sodium

Mg – Mg Magnesium

Allen – Al Aluminum

Silly – Si Silicon

Patrick – P Phosphorus

Stays – S Sulphur

Close – Cl Chlorine

Arthur – Ar Argon

Kisses – K Potassium

Carrie – Ca Calcium

Hope this helps :)

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Which is the larger atom As or P
sashaice [31]

Answer:

I think that As is larger

6 0
3 years ago
Calculate the number of moles of iodine in 7.68×10^25 molecules of I2
Dmitrij [34]

Answer:

<h2>127.57 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{7.68 \times  {10}^{25} }{6.02 \times  {10}^{23} }   \\  = 127.574750...

We have the final answer as

<h3>127.57 moles</h3>

Hope this helps you

4 0
2 years ago
An objects kinetic energy increases as its velocity increases?
stira [4]

Answer:

Because kinetic energy is proportional to the velocity squared, increases in velocity will have an exponentially greater effect on translation kinetic energy. Doubling the mass of an object will only double its kinetic energy, but doubling the velocity of the object will quadruple its velocity.

4 0
3 years ago
Read 2 more answers
WILL GIVE BRAINLIEST!!!
Hoochie [10]
Hey there!:

ΔTf = Kf * m

Molar mass glucose = 180 g/mol

number of moles glucose:

n = mass of solute / molar mass

n = 21.5 / 180

n = 0.119 moles glucose

Amount of solvent in kg = 255/1000 = 0.255 Kg

Molality = number of moles / solvent

m = 0.119 / 0.255

m = 0.466 moles/kg

Kf for water = - 1.86 ºC/*m

Therefore:

ΔTf = Kf * m

ΔTf = (-1,86) * 0.466

ΔTf = -0.86676 ºC

hope this helps!
7 0
3 years ago
Read 2 more answers
If 1000. mL of water freezes, which of the following is a reasonable approximation for the volume of the resulting ice?
Fudgin [204]

Answer:

If 1000. mL of water freezes, which of the following is a reasonable approximation for the volume of the resulting ice?

Group of answer choices

1000. mL

961 mL

1040 mL

Explanation:

Ice is fewer denser than water.

The reason is the volume occupied by the same mass of ice with water is more than the volume occupied by water. Ice has more empty space within it.

Due to this reason, ice floats on water.

When 1000ml of water freezes to ice then its volume is greater than water.

Among the given options the correct answer is 1040 mL .

7 0
3 years ago
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