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erastova [34]
2 years ago
13

Which of the following statements about the elements in group 2 of the periodic table is true?

Chemistry
1 answer:
stiks02 [169]2 years ago
8 0

Answer:

they all have two electrons in their outermost shell

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Whoever gets it right gets brainliest!!
Tasya [4]

When different atoms join together, they are called a compound. Compounds are made of molecules (so molecules could be an alternate answer, but not all molecules are compounds)

3 0
2 years ago
Read 2 more answers
Calculate the molality (m) of solution containing 20.5 g of ethylene glycol C,H,O,
Svetllana [295]

Answer:

Given

mass of solute (m) =20.5g

mass of solvent( ms) =155g

solution

malality =mX1000/mrxms

M=20.5x1000/62x155

M=2.1332

5 0
3 years ago
What is the wavelength range,in nanometer,for infrared light? In what portion of this range does the earth receive IR from the s
andrezito [222]
  • The wavelength range of Infrared radiation is 700 nanometers to 1 millimeter.
  • The sun emits mainly near-infrared which is mainly composed of wavelength below 4 micrometers.
  • The thermal range of infrared ranges between wavelengths 3.5 and 2.0 micrometers

Explanation:

The wavelength range of Infrared radiation is 700 nanometers to 1 millimeter. This also translates to a frequency range of 430 TeraHertz  to 300 Giga Hertz.

Because the sun is a star and is hot in comparison to earth and other planetary bodies, the bigger  range of infrared radiation it emits is in the near-infrared which is mainly composed of wavelength below 4 micrometers.

The earth's surface produces infrared radiation of the mid-infrared range while cooler substances will produce far-infrared range

The thermal range of infrared ranges between wavelengths 3.5 and 2.0 micrometers and is produced by black bodies.

Learn More:

For more on infrared radiation check out;

brainly.com/question/2369243

#LearnWithBrainly

7 0
3 years ago
7. (04wP2-5)Elements with atomic number 21 to 30 are d-block elements.
Katyanochek1 [597]

Answer :

  • (a) zn

Explanation:

  • (b) a ligand is an ion or molecule that binds to the central metal atom to form a cordinate complex.
  • (c)
<h3> above</h3>

3 0
3 years ago
in this trial, 0.400 M NaOH was added to 40.00 ml of 0.400 M HCl. How many ml of base must be added to cause the colour to chang
denis-greek [22]

Answer:

The amount of Ml that is needed

6 0
2 years ago
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