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OLga [1]
3 years ago
15

Which of the following notations is the correct noble gas configuration for

Chemistry
1 answer:
Setler79 [48]3 years ago
5 0

Answer:

Option B. [Ar] 4s² 3d⁷

Explanation:

The condensed form of the electronic configuration of of cobalt, Co can be written by using the closest noble gas element before the cobalt element.

Cobalt has atomic number of 27. The noble gas element before cobalt is argon (Ar).

Thus, we can write the electronic configuration of cobalt, Co as follow

Co (27) => [Ar] 4s²3d⁷

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Based on your knowledge of factors that affect the rates of chemical reactions, predict the trend in the last column of the expe
Anika [276]

Factors that increases reaction rate such as increase in concentration or pressure will reduce reaction time whereas factors that decrease reaction rate such as inhibitors will increase reaction time.

<h3>What are the factors that affect reaction rate?</h3>

Factors that affect reaction rate are those factors which increase or decrease the rate of chemical reaction.

The factors that affect reaction rate include:

  • temperature
  • concentration/pressure
  • catalysts
  • surface area
  • nature of substance

Any factor that increases reaction rate such as increase in concentration or pressure will reduce reaction time whereas factors that decrease reaction rate such as inhibitors will increase reaction time.

Learn more about factors affecting reaction rate at: brainly.com/question/14817541

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6 0
2 years ago
In the compound cah2 calcium has an oxidation number of 2+ and hydrogen has an oxidation number of
sesenic [268]

The oxidation number of H is -1.

Sum of the oxidation numbers in each element = charge of the complex

CaH₂ has 1 Ca atom and 2H atoms. The charge of the complex is zero. Let’s say Oxidation number of H is "a".

Then,

<span>    (+2) + 2 x a = 0 </span>

<span>        +2  + 2a  = 0</span>

                  2a = -2

                    a = -1

Hence, the oxidation number of Hydrogen atom in CaH₂ is -1


7 0
3 years ago
Which property do metalloids share with non metals?
mamaluj [8]

Answer:

their ability to conduct heat and electricity.

Explanation:

6 0
3 years ago
Most elements are _____? <br><br> nonmetals <br> metalloids<br> metals
NARA [144]

Answer:Most elements on the periodic table are metals. Looking at the periodic table shows that most elements are metallic.

Explanation: Sorry if this want what you were looking for

4 0
1 year ago
What is the density of CO gas if 0.196 occupies a volume of 100 no
shusha [124]
The density of CO gas if 0.196g occupies a volume of 100mL is0.00196g<span>mL or 0.00196 grams per milliliter</span>
3 0
3 years ago
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