Valerie creates a model using three different rocks. The rocks are classified as igneous, metamorphic, and sedimentary. Which property does Valerie use for classification purposes?

color
formation
shape
texture

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

um i think it might be a car?

i wish i could but this one is weird give me abc and i can solve it.

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.