How many significant figures are in 1.009 l

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

Nonmetal halogen family atmoic mass 35

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.