I Need help with science Which two groups of elements in the periodic table are the most reactive? A halogens and noble gase
B alkaline earth metals and halogens
C alkali metals and halogens
D noble gases and alkali metals

bc blah

explanation:

bc blah

the answer is 100% density i've answered this question before and done the quiz myself.

protein makes up the building blocks of organs, muscles, skin, hormones and pretty much everything that matters in your body.

some choices are:

peanut butter

seeds

eggs

yogurt

meats

fish

so pretty much meat, dairy, nuts, and grains.

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.