Use this observed pattern to predict the number of energy levels in a neutral atom:
rb - rubidium (atomic number 37)
cs - cesium (atomic number 55)
fr - francium (atomic number 87)
ni - nickel (atomic number 28)
hg - mercury (atomic number 80)
kr - krypton (atomic number 36)

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

He nucleus contains the cells genetic material in the form of dna. dna is organized into our chromosomes, which are made up of thousands of that determine our traits.

Which of the following describes qualitative data? a) recording the temperature of a solid as it is warmed. b) noting the color of a solution as it is heated. c) measuring the volume of an object by water displacement. d) taking the mass of an object using a balance.