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Mila [183]
3 years ago
11

How many protons are in an atom of strontium?

Chemistry
1 answer:
Stells [14]3 years ago
7 0

Answer:

38

Explanation:

Symbol: Sr

Atomic mass: 87.62 u

Electrons per shell: 2,8,18,8,2

Atomic number: 38

Electron configuration: [Kr] 5s2

Van der Waals radius: 255 pm

Valence electrons: two

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sammy [17]
E. HCI

Source:
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3 years ago
What happens when molecules diffuse across the cell membrane?
mafiozo [28]

Answer:

The correct answer is from areas of high concentration to low concentration.

Explanation:

A concentration gradient exists for these molecules, so they have the potential to diffuse into (or out of) the cell by moving down it.

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7 0
3 years ago
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Which of the following lists the correct symbol for the ion that tin forms when it loses 2 electrons, the correct classification
ser-zykov [4K]

Answer:

\huge\boxed{\sf Option \ A}

Explanation:

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It becomes a cation.

The name of Ion is Tin ( II ) Ion.

\rule[225]{225}{2}

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6 0
3 years ago
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All weather is energy in motion. Where does the energy come from
alekssr [168]

Answer:

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8 0
2 years ago
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The pH of a solution is measured as 4.5. What is the hydrogen ion concentration of the solution?
Bond [772]

Answer:

[H⁺] =  3.16 × 10⁻⁵ mol/L

Explanation:

Given data:

pH of solution = 4.5

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we will rearrange this formula:

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4 0
3 years ago
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