I am a fourth period transition metal. And when you look at my mass (instead of my atomic number), you would expect
me to be located one element to the left. Who am I?

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?