1) Which general trend is found in Period 2 on the Periodic Table as the elements are considered in order of increasing atomic number?
1) decreasing atomic mass
2) decreasing electronegativity
3) increasing atomic radius
4) increasing first ionization energy
2) When an atom of lithium loses an electron, the atom becomes a
1) negative ion with a radius smaller than the radius of the atom
2) negative ion with a radius larger than the radius of the atom
3) positive ion with a radius smaller than the radius of the atom
4) positive ion with a radius larger than the radius of the atom.
3) Which group contains an elements that is liquid at STP?
1)1
2)2
3)16
4)17
5) which Group 15 element exists as diatomic molecules at STP?
1) phosphorus
2) nitrogen
3) bismuth
4) arsenic
6) Which three groups of the Periodic Table contain the most elements classified as metalloids( semimetals)?
1) 1,2, and 13
2) 2,13 and 14
3) 14,15 and 16
4) 16,17, and 18
Answer what you know please. =)
1) decreasing atomic mass
2) decreasing electronegativity
3) increasing atomic radius
4) increasing first ionization energy
2) When an atom of lithium loses an electron, the atom becomes a
1) negative ion with a radius smaller than the radius of the atom
2) negative ion with a radius larger than the radius of the atom
3) positive ion with a radius smaller than the radius of the atom
4) positive ion with a radius larger than the radius of the atom.
3) Which group contains an elements that is liquid at STP?
1)1
2)2
3)16
4)17
5) which Group 15 element exists as diatomic molecules at STP?
1) phosphorus
2) nitrogen
3) bismuth
4) arsenic
6) Which three groups of the Periodic Table contain the most elements classified as metalloids( semimetals)?
1) 1,2, and 13
2) 2,13 and 14
3) 14,15 and 16
4) 16,17, and 18
Answer what you know please. =)
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1) The answer is (4). Decreasing atomic size and increasing effective nuclear charge result in increasing first ionization energy as the elements are considered in the order of increasing atomic number.
2) The answer is (3). Lithium is a metal and metals almost always form positive ions. When Lithium loses an electron, it becomes a positive ion with smaller radius than the neutral atom because when an electron is removed from the atom, the net positive charge on the atom increases and this increased positive charge helps to attract the remaining electrons more effectively thereby decreasing the size of the atom.
3) The answer is 17 and the element is Bromine. Groups 1 & 2 are metals and metals are solids at STP (except Mercury which belongs to group 12).
5) The answer is Nitrogen. Other common diatomic molecules are O2, Cl2, Br2, etc.
6) The answer is 14,15 and 16 and the elements are:
Silicon and Germanium (Group 14)
Arsenic and Antimony (Group 15)
Selenium and Tellurium (Group 16)
Another element that is commonly classified as a metalloid is Boron (Group 13).
2) The answer is (3). Lithium is a metal and metals almost always form positive ions. When Lithium loses an electron, it becomes a positive ion with smaller radius than the neutral atom because when an electron is removed from the atom, the net positive charge on the atom increases and this increased positive charge helps to attract the remaining electrons more effectively thereby decreasing the size of the atom.
3) The answer is 17 and the element is Bromine. Groups 1 & 2 are metals and metals are solids at STP (except Mercury which belongs to group 12).
5) The answer is Nitrogen. Other common diatomic molecules are O2, Cl2, Br2, etc.
6) The answer is 14,15 and 16 and the elements are:
Silicon and Germanium (Group 14)
Arsenic and Antimony (Group 15)
Selenium and Tellurium (Group 16)
Another element that is commonly classified as a metalloid is Boron (Group 13).
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3) This has two answers period 12 and period 17, you want period 17 though.
#5) I'm pretty sure the answer is nitrogen
#6) Numbers 13,14, 15, 16, and 17
#5) I'm pretty sure the answer is nitrogen
#6) Numbers 13,14, 15, 16, and 17