How many groups are in the modern periodic table?

18

Explanation:

there are 18 numbered groups in the periodic table;The F-block columns (Between groups 3 and group 4) are not numbered.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

c

explanation: