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3 years ago

Sodium has more valence electrons than magnesium. True or False

2 answers:

7 0

False magnesium is in group 2 and has 2 outer electrons where as sodium is in group 1 and therefore only has 1 valence electron.

Tom [10]3 years ago

6 0

True. I hope this helps!

You might be interested in

How many g are equal to 345.7mg?

Mumz [18]

Answer:

0,3457 grams equal to 345.7mg

Explanation:

1000 mg-------1 g

345.7mg------x= (345.7mgx 1 g)/1000mg= <em>0,3457 g</em>

4 0

3 years ago

Read 2 more answers

What will be the volume of a gas sample at 337 K if its volume at 237 K is 12.0 L? Round your answer to 1 digit after the decima

oksano4ka [1.4K]

Answer:

17.1 L

Explanation:

V1/T1=V2/T2

V2=(V1*T2)/T1

V2= (12.0L * 337K)/237K

V2=17.1L

7 0

4 years ago

1. The answer to the research question is the...

katovenus [111]

Answer:

1. A claim

2. B evidence

8 0

4 years ago

A chemist adds of a sodium thiosulfate solution to a reaction flask. Calculate the mass in grams of sodium thiosulfate the chemi

schepotkina [342]

This is a incomplete question.The complete question is:

A chemist adds 180.0 ml of a 1.77 mol/L of sodium thiosulfate solution to a reaction flask. Calculate the mass in grams of sodium thiosulfate the chemist has added to the flask. Be sure your answer has the correct number of significant digits.

Answer: 50.4 g

Explanation:

To calculate the number of moles for given molarity, we use the equation:

$\text{Moles of solute}={\text{Molarity of the solution}}\times{\text{Volume of solution (in L)}}$ .....(1)

Molarity of sodium thiosulfate solution = 1.77 M

Volume of sodium thiosulfate solution = 180.0 mL = 0.1800 L

Putting values in equation 1, we get:

$\text{Moles of sodium thiosulfate}={1.77}\times{0.1800}=0.319moles$

Mass of sodium thiosulfate = $moles\times {\text {Molar mass}}=0.319moles\times 158.11g/mol=50.4g$

Thus 50.4 g of sodium thiosulfate the chemist has added to the flask.

6 0

3 years ago

Explain the trend in reactivity of the halogens 6 marks

mojhsa [17]

Answer:

The reactivity of Group 7 elements decreases down the group. ... The electrons in the outer shell move further away from the nucleus as we go down the group and the attraction force between the electrons and the nucleus become weaker and weaker. This weaker attraction in the larger atoms makes it harder to gain electron.

4 0

3 years ago