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FromTheMoon [43]
3 years ago
5

A single atom of lithium can combine with a single atom of iodine to create electron energy stability for both atoms. True or fa

lse? ...?
Chemistry
2 answers:
ivann1987 [24]3 years ago
8 0
The answer for the given question above is TRUE. Atoms whose valence shells do not normally match the inert configuration may achieve a lower energy state by combining with other atoms. I hope this answer helps.
Elodia [21]3 years ago
4 0

Answer:

The answer is: TRUE

Explanation:

Hello!

Let's solve this!

This is true, since the Lithium atom has a valence number of +1, this means an electron to yield.

For its part, the iodine has valence number -1, this means a place to accept electrons.

When joined they make a perfect combination where it has high electronic stability.

We conclude that the answer is: TRUE

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What is the atomic number and mass number of calcium ?
solniwko [45]

Answer:

Calcium has an Atomic number of 20 and Atomic mass of 40.078 u

Hope this helps!

7 0
2 years ago
One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silv
babunello [35]

Answer:

5.0x10⁻⁵ M

Explanation:

It seems the question is incomplete, however this is the data that has been found in a web search:

" One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate solution. Any chloride anions in solution will combine with the silver cations to produce bright white silver chloride precipitate. Suppose a EPA chemist tests a 250 mL sample of groundwater known to be contaminated with nickel(II) chloride, which would react with silver nitrate solution like this:

NiCl₂ + 2AgNO₃ →  2AgCl + Ni(NO₃)₂

The chemist adds 50 mM silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She finds she has collected 3.6 mg of silver chloride. Calculate the concentration of nickel(II) chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits. "

Keep in mind that while the process is the same, if the values in your question are different, then your answer will be different as well.

First we <u>calculate the moles of nickel chloride found in the 250 mL sample</u>:

  • 3.6 mg AgCl ÷ 143.32 mg/mmol * \frac{1mmolNiCl_{2}}{2mmolAgCl} = 0.0126 mmol NiCl₂

Now we <u>divide the moles by the volume to calculate the molarity</u>:

  • 0.0126 mmol / 250 mL = 5.0x10⁻⁵M
4 0
3 years ago
Which of the following will have a larger radius than zinc ? Gallium (Ga) Magnesium (Mg) Aluminum (Al) Strontium (St)
oksian1 [2.3K]

Answer:

Strontium (St)

Explanation:

The atom that will have a larger radius than zinc is strontium, Sr.

Atomic radius is defined as the half of the inter-nuclear distance between two covalently bonded atoms of non-metallic elements or half of the distance between two nuclei in the solid state of metals.

  • Across the period atomic radii decreases progressively due to the increase in nuclear charge.
  • Down a group atomic radii increase progressively due to the successive shells of electrons being added.
  • Since strontium satisfies the criteria, it has the larger atomic radius.
7 0
3 years ago
Where is most of the mass of an atom? •
yaroslaw [1]
B. inside the nucleus
6 0
3 years ago
Will give brainliest
sergiy2304 [10]
It shows the atomic number
8 0
3 years ago
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