Atoms & PT Practice Test

Neon-22 contains 12 neutrons. It also contains

10 protons

Silicon-30 contains 14 protons. It also contains

16 neutrons

Sulphur-34 (atomic number 16) contains

18 neutrons

The electron notation for aluminum (atomic number 13) is

1s2 2s2 2p6 3s2 3p1.

Which of the following is the electron configuration of P in its ground state?

1s22s22p63s23p3

The number of valence electrons in Group 17 elements is

7

Dalton's Atomic Theory included all of the ideas listed below except: A. An element is composed of very small particles called protons, neutrons and electrons. B. All atoms of a given element have properties that differ from those of other elements. C. All atoms of a given element have identical properties. D. Atoms cannot be created or destroyed. E. Compounds are formed when atoms of different elements combine with one another in small whole-number ratios.

A

Which element has the largest atomic radius? Si, P, Al, S, Cl

Al

Arrange the following elements in order of decreasing first ionization energy. Rb, In, Sn, Sb, As

As > Sb > Sn > In > Rb

Which concept in Dalton's atomic theory has been modified?

Atoms cannot be divided

Which element has the highest first ionization energy? As, Cl, Cd, Sn, or Tc

Cl

What is the electron configuration of Mn? A. 1s22s22p63s23p64s23d104p64d115s2 B. 1s22s22p63s22d103p64s23d104p64d105s25p1 C. 1s22s22p63s22d103p64s23d104p65s24d1 D. 1s22s22p63s23p64s23d104p64d105s25p1 E. 1s22s22p63s23p64s23d104p64d105s2

D

Which one of the following electron configurations is incorrect? A, 6C [He]2s22p4 B. 19K 1s22s22p63s23p64s1 C. 9F 1s22s22p5 D. 17Cl [Ne] 3s23p5 E. 12Mg [Ne]3s2

E

What group are noble gases located?

Group 18

Which element has the largest atomic radius? P, In, Ge, Ga, O

In

As we move across the periodic table from left to right, atoms become smaller due to

Increasing effective nuclear charge

Mendeleev noticed that properties of elements usually repeated at regular intervals when the elements were arranged in order of increasing

atomic mass

Because most particles fired at metal foil passed straight through, Rutherford concluded that

atoms were mostly empty space.

In a row in the periodic table, as the atomic number increases, the atomic radius generally

decreases

Within a group of elements, as the atomic number increases, the atomic radius

decreases regularly.

Experiments with cathode rays led to the discovery of the

electron

The element that has the greatest electronegativity is oxygen, chlorine, sodium, or fluorine.

fluorine

Neutral atoms with an s2p6 electron configuration in the highest energy level are best classified as

gases

Which groups in the main group have lower electronegativity than d-block elements?

groups 1 and 2

Among the d-block elements, as atomic radii decrease, electronegativity values

increase

The energy required to remove an electron from an atom is the atom's

ionization energy.

For Groups 13 through 18, the number of valence electrons is equal to the group number

minus 10

The person whose work led to a periodic table based on increasing atomic number was

moseley

What element has the following electron configuration? [Ar] 4d104s24p5

none of these

Rutherford's experiments led to the discovery of the

nucleus

Who discovered the nucleus by bombarding gold foil with positively charged particles and noting that some particles were widely deflected?

rutherford

The orbital diagram is for

sulfur

The electrons available to be lost, gained, or shared when atoms form molecules are called

valence electrons

In Rutherford's experiments, very few positively charged particles

were slightly deflected as they passed through the metal.