The Periodic Table - Middle School Physical Science

The elements on the right side of the periodic table have more electrons in the outermost ring of their electron clouds, therefore they are less reactive.

The answer is none of these. The number on this image is the atomic number, or the number of protons. The atomic mass of this element is not listed, but is calculated by adding the mass of the protons plus the mass of the neutrons, so none of the other answer choices are plausible.

The answer is 20 amu. The atomic mass of an element is equal to the mass of all the protons plus the mass of all the neutrons. Most of the elements on the periodic table have about the same number of protons and neutrons, which both have a mass of 1 amu. Because we know the atomic number, 10, is equal to the number of protons, we can make a reasonable assumption that the atomic mass of Neon is close to 20 atomic mass units.

The answer is all of the above because the periodic table allows us to observe general trends in reactivity, electronegativity, atomic mass, atomic radius, and ionization.

The elements at the bottom of the periodic table have higher atomic masses. The atomic mass is determined by the number of protons and neutrons because electrons have an atomic mass of 0 amu.

The answer is "called the Alkali Metals and are very reactive." These elements are on the left side of the periodic table because they are highly reactive metals with a few free electrons in their orbitals. Elements with free electrons have a tendency to share electrons and combine with other elements easily.

The periodic table is divided into "groups" and "periods".

The image shows that the chemical symbol is "Ga" and the chemical's full name is Gallium. Chemical symbols are shorthand for elements on the periodic table and consist of one capital letter, and sometimes one or two lowercase letters.

Your element belongs on the far right. The elements there are usually gases in their natural state and are not very reactive.

The elements on the right side of the periodic table have more electrons in the outermost ring of their electron clouds, therefore they are less reactive.

The answer is the number of protons and the atomic number. The number of protons will always equal the atomic number, but the atomic mass is the number of protons plus the number of neutrons, which we cannot see in this image.

The answer is none of these. The number on this image is the atomic number, or the number of protons. The atomic mass of this element is not listed, but is calculated by adding the mass of the protons plus the mass of the neutrons, so none of the other answer choices are plausible.

The answer is 20 amu. The atomic mass of an element is equal to the mass of all the protons plus the mass of all the neutrons. Most of the elements on the periodic table have about the same number of protons and neutrons, which both have a mass of 1 amu. Because we know the atomic number, 10, is equal to the number of protons, we can make a reasonable assumption that the atomic mass of Neon is close to 20 atomic mass units.

The answer is all of the above because the periodic table allows us to observe general trends in reactivity, electronegativity, atomic mass, atomic radius, and ionization.

The elements at the bottom of the periodic table have higher atomic masses. The atomic mass is determined by the number of protons and neutrons because electrons have an atomic mass of 0 amu.

The answer is "called the Alkali Metals and are very reactive." These elements are on the left side of the periodic table because they are highly reactive metals with a few free electrons in their orbitals. Elements with free electrons have a tendency to share electrons and combine with other elements easily.

The periodic table is divided into "groups" and "periods".

The image shows that the chemical symbol is "Ga" and the chemical's full name is Gallium. Chemical symbols are shorthand for elements on the periodic table and consist of one capital letter, and sometimes one or two lowercase letters.

Your element belongs on the far right. The elements there are usually gases in their natural state and are not very reactive.