In the periodic table, elements of the same group are characterized by having the same similar properties.
So, first we will check the elements that lie within the same group as <span>beryllium and then we will attempt to choose the elements with atomic mass higher than 130.

So, elements in the same group as </span>beryllium are: magnesium, calcium, strontium, barium and radium.
Among these elements, we will find that:
radium has atomic mass of 226 amu
barium has atomic mass of 137.327 amu

Based on this, the two elements would be barium and radium.

3 0

3 years ago

Determine the molarity of a solution prepared by dissolving 141.6 g of citric acid , c3h5o(cooh)3 , in water and then diluting t

gogolik [260]

The molarity of a solution prepared by dissolving 141.6g of citric acid in water is calculated as below

find the the number of moles

moles= mass/molar mass

= 141.6 g/ 192 g/mol = 0.738 moles

molarity= moles/molar mass

= 0.738/3500 x1000 = 0.21 M

3 0

3 years ago

Can electricity cause a chemical change?

KiRa [710]

Yes it can cause chemical change

6 0

3 years ago