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exis [7]
2 years ago
6

Can someone help me please

Chemistry
2 answers:
Irina18 [472]2 years ago
7 0
True
Hope I helped you
borishaifa [10]2 years ago
7 0

only wave A you have given ....wave B ?

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On the periodic table, what is a group? For the main groups, what characteristic
rjkz [21]
<h3>Answer: Mendeleev’s Periodic Table was built by listing the known elements in order of increasing atomic mass and grouping the elements by their properties (such as reactivity and formula of oxides). In one or two cases, he discovered that he had to put a lower atomic mass element after a higher atomic mass element because the table which went strictly by increasing atomic mass produced groups with inconsistent properties. He also left blanks in the table.</h3>

In modern times, we know that the elements in a given group (also known as a family or column) have the same number of valence electrons, with ground state configurations having a consistent pattern, for instance:

F 1s2 2s2 2p5, Cl 1s2 2s2 2p6 3s2 3p5, Br 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p5, etc.

Of course, the ground state configurations play a major role in determining how an element reacts and what compounds it forms. Thus, the elements in a given group have similar properties.

The structure of the table also predicts how the properties vary. For instance, atomic radius increases down a group as does metallic character.

<h3>Hope this helps have a awesome day/night✨</h3>

Explanation:

4 0
3 years ago
20 POINTS!!!!
Y_Kistochka [10]
A. neutrons 

Isotopes <span>contain equal numbers of protons but different numbers of neutrons in their nuclei.</span>
8 0
3 years ago
A glass of water contains 1.2 x 1024 molecules of water. An additional 4.0 moles of water are poured into the glass. How many mo
Greeley [361]
N=1.2·10²⁴
Nₐ=6.0221·10²³ mol⁻¹
n₂(H₂O)=4 mol

n₁(H₂O)=N/Nₐ

n=n₁+n₂=N/Nₐ+n₂

n=1.2·10²⁴/6.0221·10²³ + 4 = 5.99 mol

5.99 <span>moles of water are in the glass</span>
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Convert 3.88 g/mL to units of mg/L.
Alex777 [14]

Answer:

3,880,000

Explanation:

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14. What steps should you take to keep parents and the public from viewing your personal
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All except the last one
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