5 Written questions
5 Matching questions
- Strong Nuclear Force
- Law of Multiple Proportions
- a evacuated glass tube in which a stream of electrons emitted by a cathode strikes a fluorescent material, causing it to glow(used to discover the electron)
- b negatively charged particles found outside the nucleus
- c a subatomic particle that has a positive charge and that is found in the nucleus of an atom
- d if two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers
- e a powerful force of attraction that binds protons and neutrons together in the nuleus
5 Multiple choice questions
- The number of protons in the nucleus of an atom.
- the mass in grams of 1 mol of a substance
- Uses a needle-like probe to measure differences in voltage caused by electrons that leak, or tunnel, from the surface of the object being viewed
- created by Ernest Rutherford. Replaced the Plum Pudding Model. Atom is like a miniature solar system with the positive particles in the middle and the negative particles orbiting as the planets do around the center.
- the sum of the numbers of protons and neutrons in the nucleus of an atom
5 True/False questions
Law of Conservation of Mass → the weighted average of the atomic masses of the naturally occurring isotopes of an element
James Chadwick → 1897- Idea of a subatomic negatively charged particle (electron). Made Plum Pudding model of the atom.
Plum Pudding Model of the atom → created by Ernest Rutherford. Replaced the Plum Pudding Model. Atom is like a miniature solar system with the positive particles in the middle and the negative particles orbiting as the planets do around the center.
Average Atomic Mass → a mass of an atom expressed in relation to the defined standard of 12 amu (1 carbon atom)
Avogadro's number → number of representative particles in a mole, 6.02 X 10^23