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nordsb [41]
3 years ago
9

A)State the number of valence electrons for the element O?

Chemistry
1 answer:
sergejj [24]3 years ago
7 0
A) number of valence electrons is 6
B) number of protons is same as number of electrons
C) That elements is berilium
D)I think it is Cl-37 one
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Match the characteristics and elements to their group.
Luba_88 [7]

Answer:

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Group 17 is halogens. Inert is Noble Gases. Odourless and colourless is Noble Gases. Alkali metals do not occur freely in nature. Alkali metals are malleable

Explanation:

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2 years ago
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nydimaria [60]

When a substance is entering a phase change, the gain or loss of heat is a result of energy gained or lost in forming or breaking intermolecular interaction.

The constant temperatures occur when a substance is undergoing a phase transition.  If heat is removed from a substance , such as in freezing and condensation , then the process is exothermic . In this instance , heat is decreasing the speed of the molecules causing then move slower.

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4 0
1 year ago
The magnesium reacts with the hydrochloric acid to produce a gas and a salt.
jok3333 [9.3K]

Answe r H2

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2 years ago
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marin [14]
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3 years ago
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