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3 years ago

Consider these elements: p, ca, si, s, ga. a. write the electron configuration for each element

1 answer:

7 0

Method:

1) Find the atomic number in a periodic table: the number of electrons equal the atomic number

2) Use Aufbau rule

Element atomic number electron configuration

P 15 1s2 2s2 2p6 3s2 3p3

Ca 20 1s2 2s2 2p6 3s2 3p6 4s2

Si 14 1s2 2s2 2p6 3s2 3p2

S 16 1s2 2s2 2p6 3s2 3p4

Ga 31. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p

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According to Le Chatelier’s principle, what happens when the concentration of reactants is doubled in a chemical reaction that w

siniylev [52]

According to Le Chatelier’s principle, if the dynamic equilibrium of a system is disturbed by any change in the conditions of the system then the equilibrium will adjust itself in such a way that new equilibrium moves to counteract the change.

Hence, when the concentration of reactants is doubled in a chemical reaction that was in equilibrium then the equilibrium shifts to the right to favor the formation of products.

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3 years ago

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A carbon atom has a strong tendency to do which of the following?. Answer. double bond with electrons. receive electrons. donate

Novay_Z [31]

Answer: Option (d) is the correct answer.

Explanation:

Atomic number of carbon is 6 and its electronic distribution is 2, 4. Therefore, in order to become stable and completely fill its octet carbon readily share its valence electrons with another atom.

For example, $C + 2H_{2} \rightarrow CH_{4}$

A carbon atom is also able to form a double double with valence electrons of other atom.

Thus, we can conclude that a carbon atom has a strong tendency to share electrons.

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3 years ago

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Hurry i only have till today to finsh this!

Leona [35]

Answer:

do it yourself

Explanation:

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3 years ago

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Solid calcium hydroxide is dissolved in water until the pH of the solution is 10.44. Determine the concentration of the calcium

Orlov [11]

Answer:

1.38x10⁻⁴ M

Explanation:

First, we calculate the pOH of the solution, using the given pH:

pOH = 14 - pH

pOH = 14 - 10.44

pOH = 3.56

Now we calculate the concentration of OH⁻, using the pOH:

pOH = -log[OH⁻]

[OH⁻] = $10^{-pOH}$ = 2.75x10⁻⁴ M

Following the reaction Ca(OH)₂ → Ca⁺² + 2OH⁻, we divide [OH⁻] by 2 to calculate [Ca(OH)₂]:

[Ca(OH)₂] = 2.75x10⁻⁴ M / 2

[Ca(OH)₂] = 1.38x10⁻⁴ M

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2 years ago

Alborosie

Charge:

An electron has a negative charge and a neutron has a neutral charge.

Size:

Electrons have a really small mass whereas the neutron has a mass of about 1 amu.

Location:

Neutrons are found in center of an atom, but electrons are around it.

Number:

The number of electrons and neutrons in atom varies.

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3 years ago