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3 years ago

What conclusion can you make about electrons and the periodic table?

Chemistry

1 answer:

kogti [31]3 years ago

3 0

Answer:

The number of valence electrons can be known from the group that the element is in (except the lanthanides, actinides and groups 3-12).

Explanation:

Group 1 has 1 valence electron. Group 2 has 2 valence electrons. Group 13 has 3 valence electrons. Group 14 has 4, group 15 has 5, group 16 has 6, group 17 has 7, and group 18 has 8.

Group 18 are the noble gases which are stable.

Group 17 are the halogens and react well with the alkali metals.

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What are the limitations of J.J. Thomson's model of the atom?

andrew11 [14]

Explanation:

thanks for the points big man

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3 years ago

Need help asap! A 200 L balloon is blown up inside at 100 K. It is then taken outside in the hot sun and heated to 400K. What is

liq [111]

<h2>Answer</h2>

The volume will be<u> 50 L</u>

<h2>Explanation</h2>

From Kelvin Law of Temperature, we know that

$V_{1} T_{1} =V_{2} T_{2}$

We know that

$V_{1}$ = 200 L

$T_1$ = 100 K

$T_2$ = 400 K

So,

$V_{2} = V_{1} T_{1}/T_{2}$

$V_{2} = 200*100/400$

$V_{2} = 50 L$

The answer of the givern question is 50L

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3 years ago

Read 2 more answers

A company's managers ask, "Should we increase the size of our Bluetooth wireless speaker and sell it at a higher cost?" Never pr

Ivahew [28]

Complete Question

Identify whether the following activity on the table shown on the first uploaded image are examples of business level or corporate level strategy

Answer:

The solution to this is shown on the second uploaded image

Explanation:

The explanation is shown on the third and fourth uploaded image

5 0

3 years ago

A student dissolves 3.9g of aniline (C6H5NH2) in 200.mL of a solvent with a density of 1.05 g/mL . The student notices that the

Tresset [83]

Answer:

a. Molarity= $M =2.1x10^{-1}M$

b. Molality= $m=2.0x10^{-1}m$

Explanation:

Hello,

In this case, given the information about the aniline, whose molar mass is 93g/mol, one could assume the volume of the solution is just 200 mL (0.200 L) as no volume change is observed when mixing, therefore, the molarity results:

$M=\frac{n_{solute}}{V_{solution}} =\frac{3.9g*\frac{1mol}{93g} }{0.2L} =2.1x10^{-1}M$

Moreover, the molality:

$m=\frac{n_{solute}}{m_{solvent}} =\frac{3.9g*\frac{1mol}{93g} }{0.2L*\frac{1.05kg}{1L} } =2.0x10^{-1}m$

Best regards.

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3 years ago

The state of the neuron when not firing a neural impulse is known as the _______________ _______________.

Fed [463]

Answer:Referring to the fact that a neuron either fires completely or does not fire at all.

Explanation:

6 0

2 years ago