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posledela
3 years ago
9

16. Keesha performed a chemical reaction, and the products looked quite

Chemistry
1 answer:
alisha [4.7K]3 years ago
8 0

Answer:

it's the third one

Explanation:

matter can't change, but mass can differ

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What is the most metallic character with low ionization energies
Nat2105 [25]

Answer:

Metals tend to lose electrons in chemical reactions, as indicated by their low ionization energies. Within a compound, metal atoms have relatively low attraction for electrons, as indicated by their low electronegativities.

4 0
2 years ago
Two elements are studied. One has atomic number X and one has atomic number X+2. It is known that element X is a halogen. To wha
vladimir2022 [97]

Answer:

Group 1 (or IA)

Explanation:

If element X is a halogen, then it belongs to the group 17 (or VIIA, under a different notation).

For each extra unit of atomic number, the group number increases by 1. That means that the X+1 element would belong to the group 18 (or VIIIA). <em>The X+2 element would thus belong in the group 1 </em>(or IA) one period higher (higher as in numeric value, not as in position in the periodic table).

7 0
2 years ago
Which answer below correctly identifies the type of change and the explanation when magnesium comes into contact with hydrochlor
Oliga [24]

Answer:

A chemical change because a temperature change occurred, the solid disappeared and a gas was produces

Explanation:

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Mg₍s₎ + 2HCl₍aq)⇒ MgCl₂₍aq₎ + H₂₍g₎

5 0
3 years ago
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There are 1.51 x 1024 molecules of carbon dioxide in 2.50 moles of carbon dioxide.

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A device that sends electrical impulses to the heart to correct an irregular
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A. A pacemaker

Hope this helps!
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