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Lapatulllka [165]
3 years ago
5

How is the periodic table arranged

Chemistry
1 answer:
Mashcka [7]3 years ago
8 0
The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.
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Chlorine has two isotopes, 35Cl and 37Cl; 75.77 % of chlorine is 35Cl and 24.23 % is 37Cl. The atomic mass of 35Cl is 34.969 amu
storchak [24]

Answer:

35.4528731 amu

Explanation:

To appropriately get the atomic mass unit of chlorine, we can get the answer using the masses from the isotopes. This can be obtained as follows. What we do is that we multiply the percentage compositions by the masses.

Now let’s do this.

[75.77/100 * 34.969] + [24.23/100 * 36.966]

= 26.4960113 + 8.9568618 = 35.4528731

3 0
3 years ago
Read 2 more answers
PLEASE HELP ME (JOULES)
Svetllana [295]

Answer:

The answer is not 9.9 i used that and got it wrong

Explanation:

8 0
2 years ago
A distance of one centimeter is the same as ?
rodikova [14]
C because its meters right
4 0
3 years ago
A molecule has sp2 hybridization with 1 lone pair.... The electron pair geometry of this molecule is: ... The geometry of this m
MrRa [10]

Answer:

The electron pair geometry is Trigonal planar

Molecular geometry - Bent

Approximate bond angle - <120°

Explanation:

The valence shell electron pair repulsion theory enables us to predict the shapes of molecules based on the number of electron pairs present on the valence shell of the central atom and based on the hybridization state of the central atom.

sp2 hybridization corresponds to trigonal planar geometry. Let us recall that the presence of lone pairs causes a deviation of the molecular geometry from the expected geometry based on the number of electron pairs.

Hence, owing to one lone pair present, the observed molecular geometry is bent.

6 0
2 years ago
The atomic number of aluminum is 13. What is the correct designation of the electron configuration of aluminum?.
Svetlanka [38]

Answer:

Its 1s22s22p63s23p1 ik it looks a lil goofy but i think its right

Explanation:

3 0
1 year ago
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