One isotope of sodium has 11 protons and 7 neutrons. What is the mass number of this isotope?

What can happen to an electron when sunlight hits it? select all that apply. select all that apply. it can drop down to a lower electron shell. it can move out to a higher electron shell. it can collide with the nucleus.

When a star is moving away the light waves appear to be ... Red Blue Green Yellow

Projectiles may experience both horizontal and vertical motion

Tamika inflates and ties off a balloon in her classroom and then takes it outside on a cold, winter day. Immediately, she notices that the balloon has gotten a little bit smaller. Why does this occur?

What force is responsible for your sensation of weight?

The circulatory system keeps the body and its tissues continuously oxygenated. It does this by having A) veins to carry both oxygenated blood to the tissues and deoxygenated blood to the lungs.

What is the "atomic mass" of an atom?

What type of energy comes from the food that we eat?

Which of the following are vector quantities? check all that apply. a. time b. displacement c. force d. mass

Imagine you are on a bus with a helium balloon tied on a string tied to the seat in front of you. the bus stops short to avoid running over a rabbit and you are thrown forward. what happens to the balloon in relation to the bus? 1. the balloon pops.