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irakobra [83]
2 years ago
9

PLS HELPA! Which procedure could be used to demonstrate that matter is conserved during a physical change?

Chemistry
2 answers:
Juliette [100K]2 years ago
6 0

Answer:

D

Explanation:

Fudgin [204]2 years ago
4 0

Answer:

im not too smart, but i would say, either b or d

Explanation:

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1. write the complete chemical symbol for the ion with 14 protons 15 neutrons and 18 electrons
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1.   Si^{-4}

2.  Co^{+2}

Explanation:

An ion is formed when an atom that is said to be neutral gains or losses electrons.

It is thought that a negative ion (anion) is produced as it gains electrons and a positive ion (cation) is formed when it loses an electron.

Atomic number is the total number of protons and electrons in a neutral atom.

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