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bezimeni [28]
3 years ago
15

Which is a compound? A. Kr B. O2 C. Cl2 D. CuF2

Chemistry
1 answer:
OleMash [197]3 years ago
5 0
D. CuF2 because a compound is a mixture of several elements. A B C are single elements
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Cytotoxic t cells can attack target cells with which chemical weapons?
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secrete cytotoxic substance which triggers apoptosis of target cell.

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CaCO3(s)+2H*(aq) →Ca2+ (aq)+H2001+CO262)
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8 0
3 years ago
Which periodic trend quantifies the amount of energy required to remove an electron from a neutral, gaseous atom?.
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Ionization energy refers to the amount of energy needed to remove an electron from an atom. Ionization energy decreases as we go down a group. Ionization energy increases from left to right across the periodic table.

<h3>What is ionization energy?</h3>

Ionization is the process by which ions are formed by the gain or loss of an electron from an atom or molecule.

Ionization energy is defined as the energy required to remove the most loosely bound electron from a neutral gaseous atom.

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brainly.com/question/14294648

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