What is responsible for creating the oxygen in our atmosphere? volcanoes outgassing greenhouse effect life Ozone breaking down

Explain how an ionic bond forms when magnesium atoms react with oxygen atoms.

How many dots are shown in the electron dot diagram for calcium, element number 20?

How do hydrocarbons differ in structure from carbohydrates.

What is the osmotic pressure of a. 25 M solution of NaCl at 25 degrees Celsius?

It takes more force to lift a book than a piece of paper. identify the law

How many atoms of oxygen are there in one molecule of carbon dioxide, if the chemical formula is CO2? 0 1 2 3

The speed of a chemical reaction a. is constant no matter what the temperature is. b. is independent of the amount of contact surface of a solid involved. c.

Find the de Broglie wavelength (in nm) associated with an electron that is moving with a velocity of 5230 km/s. The electron rest mass is 9.11 x 10⁻³¹ kg.

Baby Caitlen is about to turn one year old. She loves to play peek-a-boo and acts so surprised each time a hidden face appears behind her dad's hands. Why is she surprised?

8. What is an energy level? A) The region outside the nucleus where the neutron is likely to be moving. B) The region outside the nucleus where the electron is likely to be moving.