Which location represents a period on a periodic table? a. a vertical row b. a horizontal row c. a diagonal row on the periodic table d. a row on the left and right of the table

Idon't understand what to put on the left lines i'm confused can anyone ?

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

Right anwser gets marked brainliest newton's discovery concerning how fast an object will change speed is the: 1st law 2nd law 3rd law universal gravitation