Pure substances can be classified into element and compound. Choose the CORRECT pair(s).
I Diamond - element
II Salt - compound
III Sugar solution - element

I and Il only
I only
II and III only
III and III

Which of the following nuclei would be the least stable a 2 protons, 2 neutrons b 1 proton 1 neutron c 1 proton 3 neutrons d 1 proton 2 neutrons

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %

Drag the tiles to the correct locations. each tile can be used more than once, but not all tiles will be used. one or more locations will remain empty. nitrosyl fluoride has the chemical formula nof nitrogen has five valence electrons, oxygen has six, and fluorine has seven. complete the lewis structure for this covalent compound. f n = = = . : : 0 : reset next um. all rights reserved us 2