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andrezito [222]
3 years ago
15

2. Write a word equation to represent the combustion reaction of calcium.

Chemistry
1 answer:
SVEN [57.7K]3 years ago
4 0

Answer:

Calcium + Oxygen = Calcium Oxide

Explanation:

Calcium basics: -positively charged ion (cation) -99% in bones and teeth, 1% in extracellular fluid. -important for bone and tooth formation, normal cell function, and neural transmission.

Oxygen, a colourless, odourless, tasteless gas essential to living organisms. It will support life. It is noncombustible, but will actively support the burning of combustible

Symbol: O

Atomic mass: 15.999 u

Atomic number: 8

Electron configuration: [He] 2s²2p⁴

Electrons per shell: 2, 6

Melting point: -218.8 °C

Calcium reacts with oxygen to form calcium oxide. The chemical equation for this reaction is Ca + O2 → CaO.

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Answer :  The Lewis-dot structure of NH_3 is shown below.

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

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\text{Formal charge}=\text{Valence electrons}-\text{Non-bonding electrons}-\frac{\text{Bonding electrons}}{2}

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\text{Formal charge on }H_2=1-0-\frac{2}{2}=0

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Hence, the Lewis-dot structure of NH_3 is shown below.

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