what happens across the periods on the periodic table? *\nthe characteristics and properties are very…

what happens across the periods on the periodic table? *\nthe characteristics and properties are very similar across the period.\nthey all are the same size and mass.\nthe properties follow a trend that repeats every period.\nthey always increase in atomic mass.

what happens across the periods on the periodic table? *\nthe characteristics and properties are very similar across the period.\nthey all are the same size and mass.\nthe properties follow a trend that repeats every period.\nthey always increase in atomic mass.

Answer

Brief Explanations:

As you move across a period on the periodic table, the atomic number increases by one from one element to the next. Since protons and neutrons contribute to atomic mass and the number of these sub - atomic particles generally increases across a period, the atomic mass always increases. Elements in the same period do not have similar characteristics (groups have similar characteristics), they are not the same size and mass, and while there are periodic trends, the statement about properties repeating every period is not the most accurate description for what happens across a single period.

Answer:

They always increase in atomic mass.