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Anon25 [30]
3 years ago
15

Help plz 39 points!!!!!!

Chemistry
2 answers:
Keith_Richards [23]3 years ago
8 0
Medium sized - D
Dwarf - C
Neutron Star - A
Supergiant - B
Giant - E
Hope this helps :)
Rina8888 [55]3 years ago
4 0
In order,
D
A
C
B
E
I hope this helps
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PLEASE HELP!!!!!!!
Basile [38]

Answer:

2nd option

Explanation:

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3 years ago
The alkali earth metal beryllium (Be) engages in a chemical reaction and loses all of its valence electrons.
denpristay [2]

The loss of electron from an results in the formation of cation represented by the positive charge on the element whereas gaining of electron results in the formation of anion represented by the negative charge on the element.

The alkali earth metal beryllium (Be) belongs to the second group of the periodic table. The ground state electronic configuration of Be is:1s^{2}2s^{2}

From the electronic configuration it is clear that it has 2 valence electrons in its valence shell (2s^{2}).

After losing all valence electrons that is 2 electrons from 2s orbital. The electronic configuration will be:

1s^{2}2s^{0}

Since, lose of electron is represented by positive charge on the element symbol. So, the beryllium will have +2 charge on its symbol as Be^{2+}.

Hence, beryllium will have 2+ charge on it after losing all its valence electrons in the chemical reaction.

6 0
3 years ago
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Alchemist made which of the following contributions to the development of chemistry?
a_sh-v [17]
Alchemists advanced the tools and procedures for working with chemicals. Alchemists also developed methods for sorting out mixtures and cleansing chemicals. They designed equipment that is still in use today including beakers, flasks, tongs, funnels, and the mortar and pestle. Also, Alchemists backed to an unbelievable variety of what would later be acquainted as chemical industries: basic metallurgy, metalworking, the invention of inks, dyes, paints, and cosmetics, leather-tanning, and the preparation of extracts and liquors.
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Properties describe matter phsical or chemical<br>​
Wewaii [24]

Answer:

Properties describe physical matter.

Explanation:

6 0
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Compare the arrangements of individual particles in solids, liquids, and gases
pochemuha
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Liquids - the particles slide past one another
Gases - particles bounce off of surroundings and the same particles of the gas
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