N2 + 3 H2 → 2 NH3 How many grams of hydrogen are needed to completely react with 2 moles of nitrogen?

It is called a neutralization reaction

The chemical bubbles

Hope the image of the frequency formula

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts