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Kitty [74]
3 years ago
9

If there is a fire in the laboratory, notify the teacher at once; then prepare to --

Chemistry
1 answer:
geniusboy [140]3 years ago
3 0
Hbshdhsbshs shsbshshs sjsbshsb she’s s
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For the main group elements( excluding the transition elements) , is it necessary to memorize the type of ion each element makes
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You can predict it based of the electronegativity
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3 years ago
This is simple I am just confused
SOVA2 [1]

Answer:

They all have the same number of protons but different numbers of neutrons.

Explanation:

Elements will always have the same number of protons no matter the isotopes. Isotopes only change the number of neutrons. Silicon will always have 14 protons. So silicon-28 has 14 protons and 14 neutrons. Silicon-29 has 14 protons and 15 neutrons. Silicon-30 has 14 protons and 16 neutrons.

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D. all of these can produce nuclear energy
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What would be the result on the Insect population if the Bats and Mice were removed?
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We wouldn't have Coronavirus

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Why is a thermos considered a (mostly) closed system? Question 3 options: different types of liquids stay hot thermoses come in
cestrela7 [59]

Answer:

Different types of hot or cold items can be stored in a thermos and power cannot enter or exit the system when the thermos lid is tightly closed

Explanation:

Closed systems are those that do not interact or do not exchange energy with the environment that surrounds them, that is why internal temperatures and conditions are maintained.

The human body is an open system, that is, it would be the opposite of the thermos since we constantly exchange energy with the environment through sweating, emission of gases, urine, feces, and the ingestion of food.

Thermoses are systems specially created to maintain a medium, it will be maintained if its lid is hermetically closed to prevent heat leakage or entry in situations of cold fluids.

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