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Stels [109]
3 years ago
6

What substance cannot be broken down by chemical change

Chemistry
1 answer:
ki77a [65]3 years ago
5 0

Potassium is the simplest form of matter and therefore can not be broken down by chemical change.

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Rank the ions in each set in order of decreasing size, and explain your ranking:
Valentin [98]

Answer:

a) Se²⁻> S²⁻ > O²

b) Te²⁻ > I- >Cs+

c)  Cs+ > Ba²⁺ > Sr²⁺

Explanation:

(a) Se²⁻, S²⁻, O²⁻

In general, ionic radius decreases with increasing positive charge.

As the charge on the ion becomes more positive, there are fewer electrons.

The ion has a smaller radius. In general, ionic radius increases with increasing negative charge.

For ions of the same charge (e.g. in the same group) the size increases as we go down a group in the periodic table

Se²⁻> S²⁻ > O²

(b) Te²⁻, Cs⁺, I⁻

Te²⁻ > I- >Cs+

Te2- hast the biggest size, because of the double negative charge.

Cs+ has the smallest size since it has the most positive charge, compared to Te2- and I-.

(c) Sr²⁺, Ba²⁺, Cs⁺

Cs+ > Ba²⁺ > Sr²⁺

Cs+ has the biggest size, because its more downward (compared to Sr2+) and more to the left (compared) ot Ba2+.

Sr2+ has the smallest size because it's more upwords (compared to Cs+ and Ba2+)

5 0
3 years ago
For the quantum number lower case L = 0, how many possible values are there for the quantum number m subscript l?
liubo4ka [24]
Only 0 is possible for ml
6 0
3 years ago
19
Luda [366]
Bit.my/3a8Nt8n here’s the link for the answer
3 0
2 years ago
What is the shortest half life
N76 [4]

Answer:

Hey!

Your answer is element A

Explanation:

Using the graph, the element A's emission of radioactive particles ends approximately after 6 years...

A HALF-LIFE IS "HALF" OF THAT TIME PERIOD!

So if the radiation goes for 6 years the half-life is 6 divided by two which gives you 3 years!

The rest however have a longer half-life...

Because they all end at 14 yrs so their half-life in 7 years!

HOPE THIS HELPS!!

8 0
2 years ago
Q: How many of the molecules shown contain only one covalent bond?
SVETLANKA909090 [29]

Answer:

cl2 - 1 bond

HCl.- 1 bond

N2 - 3 bond

o2 - 2 bond

  • Cl requires one electron to complete it's octave so it share it's one electron with other chlorine and make a single covalent bond
  • H has one electron and Cl requires one so both form one single bond
  • N requires 3 electrons so it form 3 bonds with other N
  • oxygen requires 2 electrons so it forms 2 bond with other oxygen

5 0
2 years ago
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