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Bad White [126]
3 years ago
10

The group number tells you how many valence electrons are located in an atom. * True False

Chemistry
1 answer:
Debora [2.8K]3 years ago
6 0

Answer:

true

Explanation:

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Before mendeleev published his periodic table, dobereiner grouped similar elements into triads, in which the unknown properties
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Hydrogen bromide is the diatomic molecule with the formula HBr. It is a neutral compound and a hydrogen halide.To compute for the melting point of Br2 from the melting points of HC1 (−84.9°c) and h (−35.4°c). You must add these two amounts and divide it by 2 to get the answer:-84.9 + -35.4 / 2 = -60.15 degrees Celsius is the answer.
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A new concept that is tested in a scientific investigation is known as
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Answer : Hypothesis - When a new concept that is tested in a scientific investigation is used it is called as hypothesis.


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4 years ago
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The table here provides the temperature at mount rainer in Washington state at different elevations of September 3 2014 a temper
erastova [34]

Answer:

2000 m

Explanation:

From the question given above, the following data were:

Elevation (m) >>>>>> Temperature (°C)

4000 >>>>>>>>>>>>> –8

3500 >>>>>>>>>>>>> –4

3000 >>>>>>>>>>>>> 0

2500 >>>>>>>>>>>>> 4

Temperature = 8 °C

Elevation =?

A careful observation of the table shows that:

Elevation is reducing with 500 m, while the temperature is increasing with 4 °C.

Next, we shall determine number of increase in the temperature. This can be obtained as follow:

Last Temperature from the table = 4 °C

New temperature = 8 °C

Difference = 8 °C – 4 °C

Number of Increase = difference / 4 °C

Number of Increase = 4 °C / 4 °C

Number of Increase = 1

Thus, the temperature increased just ones from 4 °C to 8 °C

Since the temperature increased just ones from 4 °C to 8 °C, it means the elevation will decrease just ones i.e

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Thus, the temperature (i.e 8 °C) was recorded at an elevation of 2000 m

6 0
3 years ago
All molecules are made up of
FromTheMoon [43]
Molecules are made up of atoms that are held together by chemical bonds.
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3 years ago
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