molecular compounds?
What are molecular compounds?
molecular compounds are formed when two or more nonmetals share electrons.
What are metals?
They are on the left and middle of the periodic table, shiny and good conductors of heat and electricity.
What is the periodic law?
This law shows elements are arranged to increase the atomic number and show repeating patterns of properties.
What is an element ?
simplest form of pure substance.They cannot be broken into anything else byphysical or chemical means.
What is the first element in a periodic table?
Hydrogen
what is water?
water is made of two hydrogen atoms and one oxygen atom.
What are nonmetals?
Nonmetals. They are usually dull and poor conductors, found on the right side of the periodic table
What does the Periodic Law say about elements in the periodic table?
They are arranged in order of increasing atomic number and show repeating patterns of properties.
what is a compund?
compund are pure substances that are the unions of two or more elements. They can be broken into simpler substances by chemicaln means.
What is an atomic number?
An atomic number is the number of protons in an atom.
What is an ionic compound?
ionic compound is made when a metal transfers electrons to a nonmetal, creating positive and negative ions.
What are metalloids?
Metalloids have properties of both metals and nonmetals and are used in electronics.
Who was the first scientist to publish an organized periodic table of the elements?
Dimitri Mendeleev was the first
What is an atom?
atoms are the smallest part of an element that still keeps the element’s properties.
How many groups are there in a periodic table?
There are 18 groups in a periodic table
What is a covalent bond?
This type of bond holds atoms together in a molecular compound.
One reason why metaloids are important in electronics
They are semiconductors
Why do atoms in the same group, in a vertical column on the periodic table, have similar chemical properties?
Because they have the same number of valence outer shell electrons, which determines their chemical behavior.
what is Co2?
Co2 is the chemical formula for carbon dioxide.
What is the name of the group that contains highly reactive metals?
Alkali metals
what are ions?
Ions are atoms or groups of atoms that have gained or lost electrons, giving them a positive or negative charge.
What is 91 on the table?
There are 91 metals on the peridic table
Why is the Periodic Law important?
It helps scientists predict and organize the properties of elements by repeating patterns in their atomic structure.
What is sulfur
This element, found in group 16, is essential for the creation of sulfuric acid a widely used industrail
What is the name of the blue colored section on the periodic table that contains elements like iron and copper?
The blue colored section is called metals