100 points - Atomic Structure What is the difference between the mass number and the atomic mass of an element? A. The mass number is an integer, while the atomic mass is a weighted average B. The mass number includes electrons, the atomic mass does not C. The atomic mass is always larger D. There is no difference
200 points - Atomic Structure The central region of an atom where its neutrons and protons are is its ________. A. nucleus B. electron cloud C. center D. core
300 points - Atomic Structure An atom with atomic number 6 would have how many protons? A. 12 B. 6 C. 3 D. cannot be determined
400 points - Atomic Structure What is the atomic number for an element with seven protons? A. 7 B. 5 C. 4 D. 3
500 points - Atomic Structure In the modern periodic table elements are arranged by: A. number of isotopes B. atomic mass C. valence electrons D. atomic number
600 points - Atomic Structure How many neutrons in C-14? A. 7 B. 6 C. 8 D. 14
100 points - Isotopes & Mass How many neutrons does the isotope of lithium have? A. 4 B. 8 C. 5 D. 3
200 points - Isotopes & Mass In a correctly written symbol what would be located in the 'A' position? A. number of electrons B. atomic number C. mass number D. number of neutrons
300 points - Isotopes & Mass What is an isotope? A. A charged atom B. A neutral atom C. Two atoms of the same element with different amounts of protons D. Two atoms of the same element with different amounts of neutrons
400 points - Isotopes & Mass Which two components of an atom contribute to the mass? A. Neutrons and electrons B. Protons and electrons C. Protons and neutrons
500 points - Isotopes & Mass Which part of an atom is used to identify it? A. number of protons B. number of neutrons C. number of electrons D. Number of energy shells
600 points - Isotopes & Mass What is the atomic mass of 'F'? A. 17 B. 9 C. 19 D. 18
100 points - Scientists & Discoveries Which scientist stated all matter is made up of atoms, the atoms are all the same for one substance, and different for different substances A. Bohr B. Rutherford C. Dalton D. Chadwick
200 points - Scientists & Discoveries "Everything is composed of atoms" was first stated by: A. Einstein B. Democritis C. Dalton D. Moseley
300 points - Scientists & Discoveries Atoms of the same element must always have the same number of _________ A. isotopes B. electrons C. protons D. neutrons
400 points - Scientists & Discoveries Who discovered the electron? A. Democritus B. Chadwick C. Thompson D. Dalton
500 points - Scientists & Discoveries Who discovered the nucleus; determined it is the small, dense center containing all the mass? A. Democritus B. Dalton C. Thomson D. Rutherford
100 points - Dalton's Theory All elements are composed of tiny, indivisible particles called atoms. A. T B. F
200 points - Dalton's Theory Atoms of the same element are identical. A. T B. F
300 points - Dalton's Theory The atoms of any one element are different from those of any other element. A. T B. F
400 points - Dalton's Theory Atoms of different elements can physically mix together in simple whole-numbers. A. T B. F
500 points - Dalton's Theory Atoms of different elements can chemically combine with one another in simple whole-number ratios to form compounds. A. T B. F
600 points - Dalton's Theory Chemical reactions occur when atoms are separated, joined, or rearranged. A. T B. F
700 points - Dalton's Theory Atoms of one element are never changed into another element as a result of a chemical reaction. A. T B. F