Suppose you discover a new element with 120 protons and 2 electrons in its outer level. in what group does this new element belong

Which statement defines calorimetry?

A part of the periodic table is shown below: A portion of the sixteenth and seventeenth columns of the periodic table is shown. Column 16 reads eight oxygen, 16 sulfur, and 34 selenium. Column 17 reads nine fluorine, 17 chlorine, and 35 bromine.

Choose the correct energy transformation for the burning of a piece of wood. A. heat energy to light energy B. light energy to heat energy C. chemical potential energy to heat energy D. heat energy to chemical potential energy

If it takes three "breaths" to blow up a balloon to 1.2 l, and each breath supplies the balloon with 0.060 moles of exhaled air, how many moles of air are in a 3.

You place a balloon in a closed chamber at standard temperature and pressure (STP). You halve the chamber pressure. What happens to the balloon? Explain how you got your answer. a). It doubles in volume. b).

Which of these is a property of bases? They produce hydrogen gas when reacted with metals. They turn litmus paper blue. They feel sticky. They taste sour.

After Pangaea broke up, North America became part of what?

What the different betwen observe and reference

How many moles are in 12.5 g of H2O

How do the atomic number and the number of protons relate to one another? The atomic number tells us the number of protons The atomic number is protons + neutrons They do not Electron Cloud