B. kilogram.
C. gram.
D. nanometer.
Answer is: another name for groups of elements is family.
There are 18 numbered groups in the periodic table.
The elements in a group have similar physical or chemical characteristics and some groups have a specific name, for example group 17 (the halogens).
Elements in the group have the same number of valence electrons, for example, chemical elements in group 15 of the periodic table have neutral atom with a valence electron configuration of ns²np³.
In Chemistry, groups of elements are often referred to as families or groups.
In Chemistry, groups of elements are often referred to as families or groups. These groups are organized based on similar properties and characteristics. For example, the alkali metals (group 1) and the halogens (group 17) are two well-known families of elements.
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Answer: The two isotopes of boron differs in mass number rather than atomic number.
Explanation:
Isotopes are defined as the chemical species that have same atomic number but differ in their mass number.
Boron is the 5th element of the periodic table and have 2 naturally occurring isotopes. The isotopes are : B-10 and B-11
For isotope:
Percentage abundance of this isotope = 20 %
Atomic number = 5
Mass number = 10
For isotope:
Percentage abundance of this isotope = 80 %
Atomic number = 5
Mass number = 11
Hence, the two isotopes of boron differs in mass number rather than atomic number.
1.Under pressure, sedimentary rocks form from igneous rock.
2.Igneous rocks can weather, creating sediments that form sedimentary rocks.
3. During weathering, sedimentary rocks melt and form igneous rock.
4.Under pressure, igneous rock undergoes changes that form sedimentary rock.
Answer:
2. Igneous rocks can weather, creating sediments that form sedimentary rocks
Explanation:
Sedimentary rocks are formed from Igneous rocks when rocks are broken down by weathering.
Answer:
Molecular Crystal
Explanation:
Hope this helps!