Unit 8 - Science - From Practice Quiz

Alkali metals, highly reactive with oxygen, are found on the periodic table in Figure 15-1 in group:

1

The atomic mass of boron is 10.811. What is the mass number of the most abundant isotope of boron?

11

According to the periodic table in Figure 15-1, which group are the chemical elements that belong to the noble gases?

18

Chlorine, element number 17, is located in the third row and the next-to-the-last group of the periodic table. How many energy levels would be completely filled by a neutral atom of chlorine? How many electrons would be left over?

2 energy level filled, 7 electrons left over

Using the periodic table in Figure 15-1, transition elements belong to groups:

3-12

A common isotope of iron (Fe) has an atomic number of 26 and a mass number of 56. The total number of subatomic particles in the nucleus is:

56

A common isotope of Carbon has an atomic number of 6 and a mass number of 13. How many neutrons are in an atom of this isotope?

7

The mass number for an isotope of oxygen is 17 and the atomic number is 8. How many neutrons are present in this isotope of oxygen?

9? (not checked)

Of the following statements, the one which is ALWAYS TRUE is:

All lithium atoms contain the same number of protons.

What is the fundamental property of matter that can either be positive or negative?

Charge

Why don't all the electrons in an atom fall to the lowest energy level?

The lowest energy level can only hold 2 electrons.

Which of the following statements about two isotopes of the same element is FALSE? -The number of neutrons may be different between the two isotopes. -One isotope might be radioactive while the other isotope might be stable. -One isotope might have a larger mass than the other isotope. -The number of protons might be different between the two isotopes.

The number of protons might be different between the two isotopes.

Do any of the atom diagrams below represent atoms of the same element? A: 8 protons, neutrons, and electrons B: 10 protons, neutrons, and electrons C: 8 protons and elections, 10 neutrons

Yes, atom A and atom C are the same element.

Of the following elements, the one most essential to life on Earth is:

carbon

According to the periodic table in Figure 15-1, the group known as the halogens include the element:

chlorine

An atom contains ____ in various energy levels.

electrons

A period's number on the periodic table corresponds to the number of:

energy levels of the atoms in the period.

Electrons with higher energy are located:

farther from the nucleus of the atom.

The vertical columns of the periodic table are called:

groups.

The noble gases such as helium and xenon do not form chemical bonds with other elements because they:

have completely filled energy levels.

According to the periodic table in Figure 15-1, transition metals include all of the following elements EXCEPT: -potassium. -iron. -copper. -gold.

iron

Using the periodic table in Figure 15-1, all of the following elements belong to the main group elements EXCEPT: -hydrogen. -radium. -aluminum. -iron.

iron

Atoms with the same atomic number but different atomic mass are called:

isotopes.

The location of metals on the periodic table is on the:

left

The mass of an atom is determined mainly by the:

mass of the neutrons and protons.

Most of the elements in the periodic table can be described as:

metals.

Compared to protons, electrons have: (in terms of mass and charge)

much smaller mass and opposite charge.

A particle with zero charge found in the nucleus of an atom is called a(n):

neutron

Protons and neutrons are found grouped together in the:

nucleus.

A way of organizing the elements based on their chemical properties is the:

periodic table.

Horizontal rows on the periodic table are called:

periods

The ____ is one kind of particle that makes up the atom and carries a positive charge.

proton

Most non-metals on the periodic table are located on the:

right

An example of a metalloid, elements with properties between metals and non-metals, is

silicon

Atomic mass is approximately the same as:

the mass number.

Atoms of the same element may contain:

the same number of protons but a different number of neutrons.

The noble gases, such as helium and xenon, are non-reactive because:

they have completely filled outer electron shells.

The charge on a complete atom is equal to:

zero