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ATI TEAS GUIDE TO SCIENCE | UNDERSTANDING THE PERIODIC TABLE

April 3, 2019 //  by nursecheung//  Leave a Comment

ATI TEAS SCIENCE REVIEW – THE PERIODIC TABLE

PDF DOWNLOADS FROM REVIEW

PERIODIC TABLE – Full Page Slides

PERIODIC TABLE – Multiple Slides

PERIODIC TABLE – Slides with Notes

QUIZ QUESTIONS LISTED AT END OF REVIEW

Questions related to Periodic Table test your understanding of how to read the periodic table of the elements. You may also be tested on various properties shared by different groups of elements. Other questions may address atomic radii, ionization potential, and electronegativity, based on an element’s location on the periodic table.

READING THE PERIODIC TABLE

The periodic table is a table of chemical elements arranged by atomic number. Here is an example:

The elements on the periodic table are listed in order of their atomic number. Some periodic tables provide the atomic mass of the element as well:

From the periodic table, by reading the atomic number, you can determine the number of protons and electrons in a neutral atom of an element. The number of neutrons can also be determined if the mass number of the atom is known.

UNDERSTANDING PERIODS AND GROUPS

Elements of the periodic table are arranged in periods and in groups. Periods of the periodic table are organized horizontally across the table in rows. In the table show, the shaded row represents a period:

Groups in the periodic table are organized vertically down the table in columns. Groups may also be referred to as families. In the table shown, the shaded column represents a group:

Elements in different groups share certain properties. The alkali metals in group 1 are shiny, soft, and highly reactive. The alkaline earth metals in group 2 are fairly soft and fairly reactive. The transition metals in groups 3 to 12 are hard and have low to negligible reactivity. The halogens in group 17 are extremely reactive, whereas the noble gases in group 18 are extremely stable. Metals overall tend to be malleable and highly conductive of heat and electricity, whereas nonmetals break easily and are generally poor conductors. Metalloids, such as boron, silicon, and germanium, have properties between those of metals and nonmetals.




 

UNDERSTANDING ATOMIC RADII

The atomic radius of an atom is the measure of the distance from the center of the atom to its outermost orbital shell. Atoms with greater numbers of orbital shells have larger atomic radii because the outermost electrons are father away from the nucleus. The length of the atomic radii decreases as you move from the left to right across a period (row) of the table. The length of the atomic radii increases as you move down a group (column of the table).

IONIZATION POTENTIAL AND ELECTRONEGATIVITY

The term ionization energy is used to refer to the amount of energy required for the removal of one electron from an atom. The ionization energy of an atom increases as the atomic radius of the atom decreases. This means that ionization energy increases as you move from left to right across a period (row) of the table. It also decreases as you move down a group (column) of the table.

The term electronegativity is used to refer to the tendency of an atom to want to bond with other atoms by taking electrons from those atoms. Like ionization energy, the electronegativity of an atom increases as the atomic radius of the atom decreases. This means that electronegativity increases as you move from left to right across a period (row) as atomic radius decreases, and it decreases as you move down a group (column) of a table as the atomic radius increases.

UNDERSTANDING ORBITALS

The periodic table can also show the orbitals for the elements. An orbital is an area around the nucleus of a cell where electrons can be located. There are four types of orbitals.

  • An s orbital is the lowest level of energy and forms a symmetrical sphere around the nucleus. It can have a maximum of 2 electrons.
  • A p orbital is like an hourglass shape with the nucleus at the center. The p orbital has a maximum of 6 electrons.
  • D orbitals are more complex, but most look like four pear shapes connected by the nucleus at the center. The d orbital has a maximum of 18 electrons.
  • F orbitals are even more complex and are very difficult to visualize. The f orbital has a maximum of 32 electrons.

As the period numbers on the periodic table increase, the number of orbitals available also increases. Period 1 has only one orbital, s, with a maximum of 2 electrons. Period 2 elements have both an s orbital and a p orbital. Period 3 can have s, p, and d orbitals. Period 4 can have s, p, d, and f orbitals.

ATI TEAS Science The Periodic Table

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  1. Question 1 of 8
    1. Question

    Which of the following elements is most highly reactive?

    Correct

    Fluorine is a member of the halogen group, whose elements are highly reactive. Argon, neon, and radon are members of the noble gases group, whose elements are extremely stable.

    Incorrect

    Fluorine is a member of the halogen group, whose elements are highly reactive. Argon, neon, and radon are members of the noble gases group, whose elements are extremely stable.

  2. Question 2 of 8
    2. Question

    Which of the following elements is the best heat conductor?

    Correct

    Metals are better conductors of heat and electricity than are non-metals. Iron is the only metal among the answer choices. Phosphorus, sulfur, and selenium are all nonmetals.

    Incorrect

    Metals are better conductors of heat and electricity than are non-metals. Iron is the only metal among the answer choices. Phosphorus, sulfur, and selenium are all nonmetals.

  3. Question 3 of 8
    3. Question

    Tungsten (W) has greater electronegativity than which of the following?

    Correct

    Tungsten is located on the sixth row of the periodic table, and it has an atomic number of 74. Electronegativity increases as you move from left to right across a period (row) of the table, and it decreases as you move down a group (column) of the table. Hafnium is located to the left to tungsten on the sixth row, so it has a lower electronegativity value.

    Incorrect

    Tungsten is located on the sixth row of the periodic table, and it has an atomic number of 74. Electronegativity increases as you move from left to right across a period (row) of the table, and it decreases as you move down a group (column) of the table. Hafnium is located to the left to tungsten on the sixth row, so it has a lower electronegativity value.

  4. Question 4 of 8
    4. Question

    Atoms of which of the following elements have the highest ionization energy?

    Correct

    Ionization energy increases as you move from left to right across a period (row) of the table. Nickel is the element located the farthest to the right of the four elements mentioned, which all lie on the fourth row of the periodic table. Nickel therefore has the highest ionization energy.

    Incorrect

    Ionization energy increases as you move from left to right across a period (row) of the table. Nickel is the element located the farthest to the right of the four elements mentioned, which all lie on the fourth row of the periodic table. Nickel therefore has the highest ionization energy.

  5. Question 5 of 8
    5. Question

    Which of the following atoms has the smallest atomic radius?

    Correct

    The length of the atomic radius decreases as you move from left to right across a period (row) of the table, and it increases as you move down a group (column) of the table. Strontium is located to the right of rubidium on the fifth row and above barium and radium in the second column, so its atoms have the smallest atomic radii.

    Incorrect

    The length of the atomic radius decreases as you move from left to right across a period (row) of the table, and it increases as you move down a group (column) of the table. Strontium is located to the right of rubidium on the fifth row and above barium and radium in the second column, so its atoms have the smallest atomic radii.

  6. Question 6 of 8
    6. Question

    Which of the following indicate the number of electrons in a neutral atom of zinc (Zn)?

    Correct

    Zinc is found in the fourth row of the periodic table with an atomic number of 30. Its atoms therefore have 30 protons. A neutral atom of zinc would have the same number of electrons as protons, or 30 electrons.

    Incorrect

    Zinc is found in the fourth row of the periodic table with an atomic number of 30. Its atoms therefore have 30 protons. A neutral atom of zinc would have the same number of electrons as protons, or 30 electrons.

  7. Question 7 of 8
    7. Question

    Which of the following atoms has a larger atomic radius than copper (Cu)?

    Correct

    The length of the atomic radius decreases as you move from left to right across a period (row) of the table. Zinc, arsenic, and bromine are all located to the right of copper on the fourth row of the table, so atoms of these elements would all have smaller atomic radii than copper. The length of the atomic radius increases as you move down a group (column) of the table, however, so gold atoms would have a larger atomic radius than copper atoms.

    Incorrect

    The length of the atomic radius decreases as you move from left to right across a period (row) of the table. Zinc, arsenic, and bromine are all located to the right of copper on the fourth row of the table, so atoms of these elements would all have smaller atomic radii than copper. The length of the atomic radius increases as you move down a group (column) of the table, however, so gold atoms would have a larger atomic radius than copper atoms.

  8. Question 8 of 8
    8. Question

    The greatest number of protons is found in an atom of which of the following elements?

    Correct

    Cobalt has an atomic number of 27, so it contains 27 protons. Chromium has 24 protons, lithium has 3 protons, and carbon has 6 protons.

    Incorrect

    Cobalt has an atomic number of 27, so it contains 27 protons. Chromium has 24 protons, lithium has 3 protons, and carbon has 6 protons.




 





Category: ATI TEAS SCIENCE, ATI TEAS Testing, Uncategorized

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