Which is true about each element in a period or horizontal row of the periodic table?
each element has one more outer shell than the element before it.
each element bonds with the element before it.
each element has one more isotope than the element before it.
each element has one more outer electron than the element before it.

City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.

Why is nh3 classified as a polar molecule

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?