Match the following items. 1. used in engines and rockets
3
oxidation
2. a type of slow combustion
calcium
3. a chemical change
respiration
4. electron loss when combining with another element
1
rapid combustion
5. element in bone which absorbs X-rays
photosynthesis
6. reaction in which the product is glucose
souring

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table?