Determine valence electrons

1 answer:

7 0

Use the group numbers to determine the number of valence electrons. The Group number of a non-transition metal can be used to find the number of valence electrons in an atom of that element. The ones place of the group number is the number of valence electrons in an atom of these elements.

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Wewaii [24]

Answer:

okay so, 20 Ca goes to group 2A and the chemical group family is alkaline earth metal family

54 Xe goes to group 8A the chemical group family is the noble gas family

37 Rb goes to group 1A the chemical group family is alkali metal family

17 Cl goes to group 7A the chemical group family is the halogen family

Explanation:

5 0

3 years ago

A 53. 5 mL ample of an 5. 4 % (m / v) KBr olution i diluted with water o that the final volume i 205. 0 mL Expre your anwer to t

gogolik [260]

The concentration after dilution is 1.4%.

We are aware that concentration and volume are related to each other by the formula -

$C_{1}$ $V_{1}$ = $C_{2}$ $V_{2}$ , where we have initial concentration and volume on Left Hand Side and final concentration and volume on Right Hand Side.