How does helium form

Arrange the elements in decreasing order of first ionization energy. Rank from highest to lowest first ionization energy. To rank items as equivalent, overlap them.

Which property of iron is a physical property A. Ability to burn B. Ability to decompose C. Ability to bond D. Ability to conduct heat

2) suppose you discovered a new element with 120 protons and 2 electrons in its outermost energy level (valence shell). a. in which group does this new element belong? b.

How are mixtures and solutions the alike

why blue intensity of copper (2) sulphate will decrease in a voltaic cell with zinc electrode in zinc sulphate solution and copper 2sulphate solution with copper electrode in it (with salt bridge)

Number of hydrogen atoms in NaC2HO4

Calculate the pH for an acid that has a [H+] of 5.8 x10^-11 M.

Complete the lewis dot structure for h2co (in which both h atoms are bonded to c).

Do substances have to be cold to freeze?

Which statement is true of the carbon atoms that make up a diamond? A. They can slip past one another slowly. B. They are always vibrating in place. C. They vibrate only when they are heated. D. They are locked in place and do not move at all.