Dalton used the lightest element as his standard for atomic mass. what is this element?
a. hydrogen
b. carbon
c. oxygen
d. nitrogen

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot? question 7 options: the heat from the hot water is conducted through the spoon handle the hot water heats the air surrounding the upper part of the spoon. the hot water causes a physical change in the spoon handle. the hot water causes a chemical reaction to take place in the spoon.

Which statement describes evidence of a chemical reaction? a) ice melting eliminate b) water boiling c) lighting a match d) grape juice freezing

Match the mixture with the substance// i really need on this guys (it’s a pic btw)