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morpeh [17]
3 years ago
7

What is the name of the element that has electrons arranged 2,8,2 ​

Chemistry
2 answers:
poizon [28]3 years ago
7 0

Answer:

The metal element → Magnesium (Mg)

Alexus [3.1K]3 years ago
6 0

Answer:

magnesium

Explanation:

magnesium has electrons arranged 2,8,2

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Write a net ionic equation for the reaction between mno4- and fe2+ in acid solution
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Answer : The complete net ionic reaction between MnO _{4}  ^{-} and Fe ^{2+} in an acid solution, can be written as :-

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3 years ago
Give two reasons why scientists create models to study atoms.
mariarad [96]
IT will be easy to know how chemical reactions occur
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4 0
3 years ago
A sample of ammonia gas at 75°c and 445 mm hg has a volume of 16.0 l. what volume will it occupy if the pressure rises to 1225 m
ioda
In this kind of exercises, you should  use the "ideal gas" rules: PV = nRT
P should be in Pascal: 
445mmHg = 59328Pa
1225mmHg = 163319Pa

V should be in cubic meter:
16L = 0.016 m3

R = \frac{PV}{nT} = constant
\frac{P1 V1}{n T} = \frac{P2 V2}{n T}
==> P1 * V1 = P2 * V2
V2 = \frac{P1 V1}{P2} = \frac{445 0.016}{1225}
V2 = 0.00581 m3 = 5.81 L


7 0
4 years ago
2. How much force will this car experience if it collides with a wall and the collision lasts for
Pepsi [2]

The momentum of the body is 12 m/s.

<h3>What is momentum?</h3>

Momentum is the product of the mass of a body and velocity. According to Newton's second law, the rate  of change of momentum is equal to the impressed force.

The details required to answer the first two questions are missing hence we can't answer those questions. For the last question;

p = mv

m = mass

v = velocity

p = momentum

v = p/m

v =  72,000 kgm/s/6,000 kg

v = 12 m/s

Learn more about momentum: brainly.com/question/904448

6 0
2 years ago
How many Groups is the modern periodic table divided into?<br> A. 2<br> B. 3<br> C. 7<br> D. 18
RSB [31]
18

In chemistry, a group is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the f-block columns are not numbered.
4 0
3 years ago
Read 2 more answers
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