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Margarita [4]
3 years ago
8

Which of the following elements has two valence electrons?

Chemistry
2 answers:
Nastasia [14]3 years ago
7 0

The Correct answer is (A) Sr element.


The explanation:


by looking at the periodic table and look at Group 2 which has elements with two valences we can see the Sr element


and its outer shell has 2 valence electrons.


so, Sr is the element that has two valence electrons.

REY [17]3 years ago
4 0
The element A. Sr, or strontium, has two valence electrons. You can find this information by locating it on the Table of Elements, where it is in Group 2.
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Answer:

See explanation

Explanation:

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3 years ago
PLEASE ANSWER!
Marianna [84]

Answer:

0.7atm

Explanation:

Given parameters:

Initial temperature = 25.2°C  in Kelvin;  25.2 + 273  = 298.2K

Initial pressure  = 0.6atm

Final temperature  = 72.4°C in kelvin  = 72.4 + 273  = 345.4K

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Final pressure  = ?

Solution:

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             \frac{P_{1} }{T_{1} }   = \frac{P_{2} }{_T{2} }

  where P and T are temperature values

              1 and 2 are the initial and final states

Input the parameters and solve for P₂

            \frac{0.6}{298.2}   = \frac{P_{2} }{345.4}  

            P₂   = 0.7atm

3 0
3 years ago
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