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babunello [35]
3 years ago
11

Which event always involves a chemical change A boiling B melting C conducting D burning

Chemistry
1 answer:
Andrew [12]3 years ago
4 0
The answer is Burning
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mart [117]

Answer:it will be malfunction

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Which of the following elements would most likely form an ion with a +2 charge?
julsineya [31]

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What is the effect of adding more CO2 to the following equilibrium reaction? CO2 + H2O H2CO3 A. More H2CO3 is produced. B. More
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2 years ago
Which of the following atoms or ions does not have a filled outer subshell?CaSZn2+S2Ca2+
ipn [44]

S and S²⁻ do not have the outer subshell fully filled with electrons.

Explanation:

We look at electronic configurations:

Ca   1s² 2s² 2p⁶ 3s² 3p⁶ 4s² - the outer subshell 4s² is fully-filled with electrons

S      1s² 2s² 2p⁶ 3s² 3p⁴ - the outer subshell 3p⁴ is not fully-filled with electrons

Zn²⁺  1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s⁰ - here the 4s subshell is higher in energy than 3d subshell so will consider 3d¹⁰ the out subshell which is fully-filled with electrons

S²⁻  1s² 2s² 2p⁶ 3s² 3p² - the outer subshell 3p² is not fully-filled with electrons

Ca²⁺ 1s² 2s² 2p⁶ 3s² 3p⁶ - the outer subshell 3p⁶ is fully-filled with electrons

Learn more about:

electron configurations

brainly.com/question/5524513

brainly.com/question/6991243

#learnwithBrainly

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3 years ago
Drive down any three characteristic of modern periodic table​
Nitella [24]
Electronegativity
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Ionization energy
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