- Which of the following elements is in the same period as phosphorus?
b. magnesium
2. the modern periodic table is arranged in order of increasing atomic ____
c. number
3. Which of the following categories includes the majority of the elements ?
c. metals
4. of the elements Pt, V, Li, and Kr, which is nonmetal?
d. Kr (Krypton)
5. The atomic number of an element in the total number of which particles in the nucleus?
b. protons
6. what element has the electron configuration:
1s^2 2^2 2p^6 3s^2 3p^3
phosphorus (15)
7. which of the following is true about the electron configuration of the noble gasses?
a. the highest compound s and p sublevels are completely filled
8. which of the following elements is a transition metal?
b. copper
9. which of the following groups contains only representative elements?
c. Al, Mg, Li
10. of the elements Fc, Hg, U and Te which is a representative element?
d. Te
11. how does atomic radius change from top to bottom in a group in the periodic table?
d. it tends to increase
12. what causes the shielding effect to remain constant across a period?
a. electrons are added to the same principal energy level
13. what element in the second period has the largest atomic radius?
b. lithium
14. which of the following elements has the smallest atomic radius
b. chlorine
15. what is the charge of a cation?
a. a positive charge
16. which of the following statements is true about ions?
b. cations form when an atom loses electrons
17. why is the second ionization energy greater than the first ionization energy?
d. the nuclear attraction from protons in the nucleus decreases
18. in which of the following sets are the charges gives correctly for all the ions?
b. k+, Sr^2, O^2-
19. what is the element with the lowest electronegativity value?
a. cesium
20. what is the element with the highest electronegativity value?
d. fluorine
21. for group 2A metals, which electron is the most difficult to remove?
c. the third
22. Which of the following factors contribute to decrease in ionization energy within a group in the periodic table as the number increases?
b. increase in size of the nucleus
23. which statement is true about electronegativity?
d. electronegativity generally increase from left to right across a period
24. compared with the electronegativities of the element on the left side of a period to electronegativities of the element in the right side of the same period tend to be
b. higher
25. Which of the following statement correctly compares the relative size of an ion to its neutral atom
a. the radius of an anion is greater than the radius of its neutral atom
26. which group of elements in the periodic table is known as alkali metals?
group 1
27. which group in the periodic table is known as the noble gasses?
group 18
28. an element has an atomic number of 80, how many protons and electrons are in an atom of the element
80 protons and 80 electrons
29. what is the electron configuration of oxygen?
1s2 2s2 2p4
30. what is the electron configuration of sulfur?
1s2 2s2 2p6 3s2 3p4
31. from which orbital is a lithium atom is an electron transferred to form Li+ ?
s2
32. what is the noble gas configuration for sulfur
[Ne]3s2 3p4
33. what is the noble gas configuration for gallium?
[Ar] 3d10 4s2 4p1
34. how many electrons are in the highest occupied energy level for oxygen?
6 electrons
35. how many valence electrons are there for nitrogen?
5 valence electrons
36.
H
37.
I
38.
f
39.
D
40.
E
41.
C
42.
G
43.
J
44,
A