For a person who is nearsighted, what would they need to have a focal point at the retina?
a. concave lens
b. concave mirror
c. convex lens
d. convex mirror

Will give brainliest! which statement best describes the difference between strong nuclear forces and weak nuclear forces? weak nuclear forces are involved when certain types of atoms break down. strong nuclear forces are responsible for holding atoms' nucleus together. weak nuclear forces hold bonds between atoms together. strong nuclear forces hold together the nucleus of an atom. strong nuclear bonds prevent atoms from falling apart. weak nuclear bonds prevent compounds from falling apart. strong nuclear forces are involved in breaking electrons from their shells. weak nuclear forces hold protons in the nucleus.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Which of these metals are magnetic?