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Rufina [12.5K]
2 years ago
10

PLEASE BE FAST

Chemistry
1 answer:
Reil [10]2 years ago
5 0

Answer:

true is true bro 1 is false and athore is true

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elect the correct answer. The elements beryllium, calcium, and strontium are all in group 2. What is the correct relationship of
deff fn [24]

Answer:

D. Sr < Ca < Be  

Step-by-step explanation:

<em>Ionization energ</em>y decreases from top to bottom within a Group, because the valence electrons are further from the nucleus and therefore easier to remove.

Thus, <em>Sr has the lowest</em> ionization energy and <em>Be the highes</em>t.

The correct order is Sr < Ca < Be.

3 0
3 years ago
A limestone plateau has no surface water. All the water is pulled underground through cracks and crevices in the surface. What m
BaLLatris [955]

Answer:

Chemical weathering due to water

Explanation:

Since all the water is pulled underground through cracks and crevices on the surface, it makes the limestone plateau have no surface water. Meanig the most likely cause for having the underground of the plateau to change over time is the chemical weathering due to water.

7 0
3 years ago
What's the word called part of an experiment that changes to observe an outcome?
Fiesta28 [93]
That is called the<u> variable</u> because it varies/changes in the experiment,

it's like x in algebra (with more than one placeholder), if it changes, it normally gives you a different result
8 0
3 years ago
As the elements of group 16 (VIA) are considered from top to bottom on the Periodic Table, the atomic radii
mina [271]
For group 16 elements, the atomic radii increases  down the group as a shell of electron is added on each time.
4 0
3 years ago
In which two types of reactions do opposite chemical changes occur
RideAnS [48]

Hello!

Before I can answer your question we need to know the different types of chemical reactions that can occur:

  • Single Replacement
  • Double Replacement
  • Synthesis
  • Decomposition
  • Combustion

Combustion is an answer that can usually be ruled out unless oxidation is occuring in the chemical equation (hyrdrogen occuring with oxygen to react)

Synthesis reaction, also known as a Combination reaction, is when the reactants combine to form a single product.

Decompostion is when a single reactant is deconstructed to form multiple products, or the opposite of Synthesis.


With these definitions alone, since they are opposite types of reactions, the answer would be Synthesis and Decomposition reactions !

Hope this helps and if you need anymore clarification feel free to ask.


4 0
3 years ago
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