Nt1310 Unit 6 Essay

Notes & Lesson Check 4.3
Atoms are composed of protons, neutrons, and electrons
Protons and Neutrons make up the nucleus
Electrons surround the nucleus
Number of neutrons = (protons & neutrons) mass number – atomic number
#26 – 28 are key points

26. What distinguishes the atoms of one element form the atoms of another?
Elements are different because they contain different numbers of protons.

27. How do the isotopes of a given element differ from one another?
Isotopes of an element have different numbers of neutrons, they also have different mass numbers.

28. How is atomic mass calculated?
Multiply the mass of each isotope by its natural abundance, expressed as a decimal, and then add the products.

29. What equation