Which information was NOT known when Dmitri Mendeleev first devised his periodic table in 1869?
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a. shared chemical properties among small groups of elements

b. the tendency of elements to combine with

other elements in fixed, whole-number ratios

c. atomic weights for all then-known elements

d. atomic numbers and the existence of subatomic particles


2.When Dmitri Mendeleev published his periodic table of the elements in 1869, there were 59 known elements. Today there are 118 known elements. Mendeleev's periodic table, despite the increase in the number of discovered elements, maintains much of its original structure.what is one feature of Mendeleev's periotic table design that made it possible to accommodate new elements.


3.Groups of elements in the periodic table have similar chemical properties based upon the atoms':

a. atomic mass

b. number of energy levels

c. atomic number

d. number of valence electrons


4.Elements 37-54 are located in a family.

True

False

5.Metalloids are elements that:

a. have a high luster

b. are excellent conductors of electricity

c. have properties of both metals and nonmetals

d. are excellent insulators

6.Which of the following groups contains reactive elements that need to gain only one electron to have a full outer energy level?

a. alkali metals

b. alkaline earth metals

c. halogens

d. noble gases

7.What is the name of the group (family) that includes the elements radium, strontium, and magnesium?

a.noble gases

b. metals

c. alkaline earth metals

d. alkali metals

8.Which of the following is not true of the chalcogen group?

a. atoms of this group have six electrons in the outermost s and p sub-levels

b. includes sulfur

c. includes only nonmetals

d. includes metalloids

9.The alkali metal group includes: hydrogen, lithium, sodium, potassium, rubidium, cesium, and francium.

True

False

10.Classify the following elements as alkali, alkaline earth, or halogen. 

A.calcium

B.iodine

C.potassium

11.The atomic mass of an element is the:

a. combination of neutrons and protons in an atom of that element

b. weighted average of the masses of known, naturally-occurring isotopes of an element

c. number of electrons in an atom of that element

d. number of protons in an atom of that element

12.For any element, its atomic number is generally larger than the atomic mass.

True

False

13.The symbol for the element titanium is Tm.

True

False

14.Hf is the symbol for the element Heffner.

True

False

15.Which of the following four elements has the smallest radius?

a. potassium (K)

b. francium (Fr)

c. magnesium (Mg)

d. nitrogen (N)

16.Which of the following elements has the highest ionization energy?

a. chlorine

b. silicon

c. sulfur

d. selenium

17.The energy required to remove an electron from a neutral atom is the:

a. atomic size

b. ionization energy

c. electronegativity

d.electron affinity

18.The electron configuration 1s22s22p3 describes the electrons of the phosphorus atom.

True

False

19.The abbreviated electron configuration for cesium is [Kr] 5s24d105p66s1.

True

False

20.Which of the following noble gas cores should be used for the shorthand electron configuration of tin?

a. [Ne]

b. [Ar]

c. [Kr]

d. [Xe]

21.Which of the following groups of elements contains the most valence electrons per atom?

a. Halogens

b. Chalcogens

c. Noble gases

d. Alkali metals

22.Which of the following elements possesses the most valence electrons?

a. argon

b.fluorine

c. helium

d. plutonium

23.Atoms of the noble gas elements possess complete valence energy levels.

True

False

24.The chalcogens possess five electrons in the valence energy level.

True

False

25.How many dots should be drawn around the symbol, C, to create the Lewis dot structure for a carbon atom?

a.two

b. four

c. six

d. eight

26.To achieve an octet in the valence energy level, an oxygen atom will gain two electrons.

True

False

27.To achieve an octet in the valence energy level, a fluorine atom will gain two electrons.

True

False

28.To achieve an octet of valence electrons, a magnesium atom becomes Mg2+.

True

False

29.To achieve an octet of valence electrons, a cesium atom will become an ion with what charge?

a. -2

b. -1

c. +1

d.0

30.To achieve an octet of valence electrons, an iodine atom will become an ion with what charge?

a. -2

b. -1

c. +1

d. +2

31.To achieve an octet, the oxygen atom forms an ion. The name of this ion is:

a. oxide ion

b. oxygen ion

c. oxic ion

d. oxous ion

32.The correct name for a Mn4+ cation is:

a. -manganese ion

b. -manganese (IV) ion

c.-manganese-four ion

d. -manganese4 ion

33.The suffix for the name of a monatomic anion (negatively charged particle) is:

a. -ous

b. -ic

c. -ide

d. -ive

34.It is possible for the transition metal zinc to form more than one possible ion.

TRUE

FALSE

35.In the name "copper (II) ion," the "II" stands for the number of electrons gained when the copper atom becomes an ion.

TRUE

FALSE

36.Fe2+ is known as the iron (II) ion.

TRUE

FALSE

37.how you can use the electron configuration to determine whether the element Gallium would form a cation or anion. What is the most common Gallium ion?






 

























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