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PDF Download FREE CHEMISTRY AND STUDY GAMES ABOUT ATOMS &
PERIODIC TAB EXAM QUESTIONS
Actual Qs and Ans Expert-Verified Explanation
This Exam contains:
-Guarantee passing score -37 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation
Question 1: Which scientist proposed the "plum pudding" model?
Answer:
JJ. Thomson
Question 2: How many periods and groups are on the periodic table?
Answer:
PERIODS-7, GROUPS-18
Question 3: How many elements are found in nature?
Answer:
92
Question 4: Who was the first person to create a periodic table of elements?
Answer:
Dmitri Mendeleev
Question 5: What property are the groups in the periodic table arranged by?
Answer:
SIMILAR PROPERTIES
Question 6: a charged atom
Answer:
ION
Question 7: number of protons in the nucleus of an atom.
Answer:
ATOMIC NUMBER
Question 8: the sum of the protons and neutrons in the nucleus of an atom
Answer:
MASS NUMBER
Question 9: neutrally charged particles found in the nucleus of an atom
Answer:
NEUTRONS
Question 10: horizontal rows of elements on the periodic table
Answer:
PERIOD
Question 11: In a single neutral atom the number of protons equals the number of __
Answer:
electrons Question 12: If the atomic number of an element is 9 and the mass number is 20, what is the number of neutrons?
Answer:
11
Question 13: vertical columns of elements on the periodic table, arranged by similar properties
Answer:
GROUP
Question 14: Which group of elements are stable (unreactive)?
Answer:
NOBLE GASES (group 18)
Question 15: What's the relationship between valence number and reactivity?
Answer:
In general, the more valence electrons, the lower the reactivity with the EXCEPTION of group 17 (Halogens). The halogens are very reactive because they only need one more electron to become stable.
Question 16: average of the masses of the isotopes of an element
Answer:
ATOMIC MASS
Question 17: If an element with atomic # 26 has 26 neutrons, is it an isotope? Explain choice.
Answer:
No, because the # of neutrons is same as # of protons.Question 18: The chemical properties of an element depend the the location of these
Answer:
electrons
Question 19: developed nuclear model of atom
Answer:
Rutherford
Question 20: Which group is more reactive, one or two?
Answer:
one--it has less valence electrons
Question 21: Name this element: there's 2 electrons in 1st shell, 8 in second shell, and 5 in last shell.
Answer:
PHOSPHORUS (atomic #15) Question 22: What causes an atom to be chemically reactive? (why will it tend to bond with other elements?)
Answer:
An atom is usually chemically reactive because its outer energy level is not full.
Question 23: Group 2 is known as the __
Answer:
the ALKALINE EARTH METALS
Question 24: the positively charged particles found in the nucleus of an atom
Answer:
PROTONS
Question 25: Group number 1 is known as __
Answer:
the ALKALI METALS Question 26: Name this element: there's 2 electrons in 1st shell, 6 in second shell.
Answer:
OXYGEN (atomic # 8)
Question 27: Which group of elements are the most reactive nonmetals?
Answer:
HALOGENS (group 17) Question 28: negatively charged particles found in the electron cloud surrounding the nucleus of an atom
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