Which of the following elements is an alkali metal? a. potassium (k) b. calcium (ca) c. chromium (cr) d. germanium (ge)

What is the density of the black hole

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration?