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Periods go across the periodic table. Groups go down.
Periods are the elements on the periodic table that go across, in rows. So basically going across each row is called a period
The statement applies to the horizontal rows or periods in the periodic table is that properties change going across each row.
A row of elements is known as a Period, while a column is known as a group, or family.
Electron shells
Periods go across the periodic table. Groups go down.
The sun seems to move across the sky because the Earth turns on its axis. That is the only correct explanation. There have been other explanations:,0 my favorite is that the god Apollo drives his flaming chariot across the sky every day.
Periods are the elements on the periodic table that go across, in rows. So basically going across each row is called a period
The rows across the periodic table are called periods.
Periods.
Periods (across the periodic table) have increasing atomic mass. Groups (down the table) have similar properties and reactive natures.
Patterns are classified across periods of time.
The rows are called periods. And the columns are called groups.
Osmosis is the movement of water molecules across a selectively permeable membrane.
There were no nurses during the periods when the plague swept across Europe.
Electronegativity increases across the second and third periods or rows of the periodic table until the noble gases are reached; then electronegativity drops substantially. There is little change if any in electronegativity in the part of the higher numbered periods that represents transition metals, but the increase in electronegativity resumes in column 13 of these periods.
Periods on the periodic table go across and are based on the number of unexcited electrons increasing as you read across. Groups on the periodic table are read down the table and share the same number of valence electrons.