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Firdavs [7]
3 years ago
5

How did Henry Mosley organize the periodic table?

Chemistry
1 answer:
vaieri [72.5K]3 years ago
8 0

Answer:

He realized that an element is defined by its number of protons. ... When Moseley arranged the elements in the periodic table by their number of protons rather than their atomic weights, the flaws in the periodic table that had been making scientists uncomfortable for decades simply disappeared.

Explanation:

google

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PLEASE HELP ASAP
snow_lady [41]

Answer:

See explanation

Explanation:

A redox reaction equation shows a gain/loss of electrons from left to right in a reaction. In a redox reaction, a specie looses electrons while another specie gains electrons.

Considering the equation; 2Al(s) + 3Cu(NO3)2(aq) -----> 3Cu(s) + 2Al(NO3)3(aq)

The oxidation state of Al reactant is zero since the oxidation state of all uncombined elements is zero. The oxidation state of All in the product is +3

The oxidation state of the copper in the reactant is +2. The oxidation state of copper in the product is zero.

The oxidation state of N in the reactant and product is +5.

The oxidation state of oxygen in the reactant and product is (-2).

This is a redox reaction because from left to right, Al was oxidized (oxidation number increased from zero to +3) while Cu was reduced (oxidation number decreased from +2 to zero).

8 0
3 years ago
If I add water to oil what will happen
Alex

The oil, even a little drop, will spread out over the water surface and break up into many little blobs.

8 0
3 years ago
How many valence electrons are in cbr2cohnh2
marishachu [46]

Answer:

36 valence electrons

Explanation:

Given CBr₂COHNH₂ => Br₂C = C - O - H

                                                    |

                                             H - N - H

#Valence e⁻s  = 2Br + 2C + 3H + 1N + 1O = 2(7) + 2(4) + 3(1) + 1(5) + 1(6)

    = 14 + 8 + 3 + 5 + 6 = 36 valence electrons

Addendum ...

#Bonded e⁻s =  2Br + 2C + 3H + 1N + 1O = 2(8) + 2(8) + 3(2) + 1(8) + 1(8)

   = 16 + 16 + 6 + 8 + 8 = 54 bonded electrons

#Covalent Bonds = #Valence e⁻ - #Bonded e⁻ / 2 = (54 - 36) / 2 = 9 cov. bonds.

8 0
3 years ago
What are the basis of making symbols????​
telo118 [61]

Answer:

1/ Using the first letter of the name of the elements.

2/  If the name of two or more elements begins with the same letter,the second letter of their name is also taken with first letter.

3/ Symbols are made by using the letters of the name of elements in other languages also.

4 0
4 years ago
HELP! ONLY HAVE & MINUTES LEFT!
Ainat [17]
All the objects are formed from the gas and dust orbitting the sun
3 0
3 years ago
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