chem chap 4

Determine the number of neutrons in each of the following atoms given the mass number and atomic number. Match the numbers in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer.

1. An atom of oxygen with a mass number of 16 and an atomic number of 8 has a total of 8 neutrons. 2. An atom of argon with a mass number of 38 and an atomic number of 18 has a total of 20 neutrons. 3. An atom of aluminum with a mass number of 24 and an atomic number of 13 has a total of 11 neutrons. 4. An atom of oxygen with a mass number of 17 and an atomic number of 8 has a total of 9 neutrons. 5. An atom of phosphorous with a mass number of 32 and an atomic number of 15 has a total of 17 neutrons.

What is the group number and number of valence electrons for boron? Express your answers as integers separated by a comma.

13,3

What is the group number and number of valence electrons for thallium? Express your answers as integers separated by a comma.

13,3

What is the group number and number of valence electrons for tin? Express your answers as integers separated by a comma.

14,4

What is the group number and number of valence electrons for bismuth? Express your answers as integers separated by a comma.

15,5

What is the group number and number of valence electrons for radon? Express your answers as integers separated by a comma.

18,8

What is the group number and number of valence electrons for calcium? Express your answers as integers separated by a comma.

2,2

fluorine Enter your answer as integers separated by commas.

2,7

neon Enter your answer as integers separated by commas.

2,8

magnesium Enter your answer as integers separated by commas.

2,8,2

aluminum Enter your answer as integers separated by commas.

2,8,3

Write the electron level arrangement for each of the following atoms.(For sodium, the answer would be 2,8,1) phosphorus Enter your answer as integers separated by commas.

2,8,5

sulfur Enter your answer as integers separated by commas.

2,8,6

Enter the appropriate symbol for an isotope of phosphorus-32 corresponding to the isotope notation AZX Express your answer as a chemical symbol using isotope notation.

32/15 P

a noble gas in period 3 Express your answer as a chemical symbol.

Ar

contrast agent for X rays, BaSO4 Give only the names of the elements alphabetically, separating them with commas.

Barium,Oxygen,Sulfur

What are the chemical symbols of the following elements: beryllium, sodium, silicon, oxygen, fluorine, argon, iron, zinc, gold, and tin? Enter the chemical symbols, in order, separated by commas.

Be,Na,Si,O,F,Ar,Fe,Zn,Au,Sn

a halogen in period 4 Express your answer as a chemical symbol.

Br

Identify each of the following as describing a proton, a neutron, or an electron. Drag the appropriate items to their respective bins.

Electron only: has a −1 charge is attracted to the proton Neutron only: has a mass about the same as that of a proton Proton and neutron only: is found in the nucleus

On a dry day, your hair flies apart when you brush it. How would you explain this? Match the words in the left column to the appropriate blanks in the sentences on the right.

In the process of brushing your hair, electrons are transferred from the brush to your hair. This buildup causes an excess of negative charge on the strands of hair. Since objects with the same charge will repel each other, the strands fly apart.

Rank the following elements by atomic radius. Rank from largest to smallest atomic radius. To rank items as equivalent, overlap them.

Largest to Smallest (Top to Bottom) Mg Al Si Cl Ar

Arrange the following elements in order of increasing atomic mass. Rank the masses of the elements from lightest to heaviest. To rank items as equivalent, overlap them.

Lightest to heaviest (Top to Bottom) Li C O Mg Al Ca Cr Fe Xe Pb

antacid, Mg(OH)2 Spell out the names of the elements separated by commas.

Magnesium,Oxygen,Hydrogen

an alkaline earth metal in period 3 Express your answer as a chemical symbol.

Mg

Rank the following atoms by number of valence electrons. Rank from most to fewest valence electrons. To rank items as equivalent, overlap them.

More valence electrons to less valence electrons (Top to Bottom) Kr I Sb In K

29 14 Si Express your answers as integers separated by commas.

Np,Nn,Ne = 14,15,14

98 43 Tc Express your answers as integers separated by commas.

Np,Nn,Ne = 43,55,43

For the following atoms, determine the number of protons, neutrons, and electrons: 114 48 Cd Express your answers as integers separated by commas.

Np,Nn,Ne = 48,66,48

136 54 Xe Express your answers as integers separated by commas.

Np,Nn,Ne = 54,82,54

222 86 Rn Express your answers as integers separated by commas

Np,Nn,Ne = 86,136,86

salt substitute, KCl Spell out the names of the elements separated by a comma.

Potassium,Chlorine

The diagram of a lithium atom is shown in Figure 1. Sort each of the items into the appropriate bin using the diagram of a neutral lithium atom for reference.(Figure 1) Drag each item to the appropriate bin.

Proton: +1 charge approximately the same mass as a neutron particle labeled "B" Neutron: no charge particle labeled "A" Electron: smallest mass of thethree particles -1 charge particle labeled "C"

group 6A (16), period 3 Express your answer as a chemical symbol.

S

group 4A (14), period 3 Express your answer as a chemical symbol.

Si

If the atomic mass for copper on the periodic table is 63.55, are there more atoms of 63/29Cu or 65/29Cu in a sample of copper? Match the words in the left column to the appropriate blanks in the sentences on the right.

There are more atoms of 63/29 Cu in a sample of copper because the mass number of copper, which is 63.55 amu, is closer to the mass number of the isotope present in the highest percentage.

Rank these elements according to their ability to conduct electricity. Rank from best to worst conductor. To rank items as equivalent, overlap them.

Worst conductor to Best conductor (Top to Bottom) Cd Si Br

dental cement, Zn3(PO4)2 Spell out the names of the elements separated by commas.

Zinc,Phosphorus,Oxygen

Sodium and potassium are examples of elements called _______.

alkali metals

Which of the subatomic particles listed carries an electrical charge: proton, neutron, electron?

both proton and electron

Nine of the ten most abundant elements on earth are representative elements. The tenth is a transition element. Which of the following is a transition element: carbon, neon, iron, silicon?

carbon

Identify the group or period that contains Na, K, and Rb.

group 1A

Identify the group or period that begins with the element Be.

group 2A

Identify the group or period that contains the halogens.

group 7A

Identify the group or period that contains B, N, and F.

period 2

In an atom, the number of electrons is equal to the number of _______.

protons

The atomic number gives the number of _______ in the nucleus.

protons

The alkaline earth metals derive their names from the fact that when these elements combine with oxygen, they are basic (alkaline) in water. "Earth" is an old term applied by early chemists to nonmetallic substances that are insoluble in water and resistant to heating. Which of the following elements is an alkaline earth metal: rubidium, iron, radium, chlorine?

radium