A radioactive nuclide that is used for geological dating has an atomic number of 19 and mass number 40. which is the symbol of this nuclide?

What does the force of gravity on an object depend on A: Molecules B: The objects mass C: compounds D: charged particles

Sodium atom Sodium has an atomic number of 11. Which atom would form an ionic bond with a sodium atom? Select one: a. Helium atom b. chloride atom c. Carbon atom d. oxygen atom

Which of the following is not a physical property of matter?

The amplitude of a wave is most directly related to what wave characteristic? Crest length Frequency Wavelength Wave height

6 Li + N2 - -> 2 Li3N How much N2 is needed to make 1.34 moles of Li3N?

How many atoms of gold (Au) are present in a sample of 2.5 mol Au? A. 1.5 * 1024 atoms Au B. 1.5 * 1023 atoms Au C. 4.2 * 1024 atoms Au D. 4.2 * 1023 atoms Au

what might cause the goldfish population to drop if the temperature moves out of its normal range? Name three things

Why must a chemistry experiments performed in a well ventilated room?

What kind of chemical bond does salt have?

How does phosphorus enter the human body?