The model of the atom has changed as scientists have gathered new evidence. Four models of the atom are shown below, but one important model is missing. Which atomic model is missing from this set?

Bohr’s model
Dalton’s model
Rutherford’s model
Thomson’s model

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

What best discribes the relationship between wavelength and frequency in a electromagnetic wave

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided