Elements & Symbol
This type of substance cannot be broken down into simpler substances by chemical means.
What is an element?
On the periodic table, periods are arranged in this direction.
What is horizontal arrangement?
This subatomic particle carries a negative charge in an atom.
What is an electron?
The atomic number of an element represents this quantity in an atom.
What is the number of protons?
Atoms of the same element that have different mass numbers are known by this term.
What are isotopes?
This is the maximum number of letters allowed in a chemical symbol.
What is two?
Chlorine, bromine, and iodine all belong to this group and share this group name on the periodic table.
What is Group 7A, the halogens?
Most of an atom’s mass is found in this part of the atom.
What is the nucleus?
A neutral atom with 12 protons has this many electrons and is this element on the periodic table.
What are 12 electrons and magnesium?
Atomic mass is written as a decimal on the periodic table because it represents this type of value for an element’s isotopes.
What is a weighted average of the naturally occurring isotopes?
This element is the basis of all organic compounds.
What is carbon?
Silicon is classified as this type of element on the periodic table.
What is a metalloid?
This experiment demonstrated that atoms contain a small, dense, positively charged nucleus.
What is Rutherford’s gold foil experiment?
An atom with a mass number of 35 and an atomic number of 17 contains this many neutrons.
What is 18?
Isotopes of the same element differ from one another by this subatomic particle.
What is the number of neutrons?
This element has its name derived from the Latin word argentum?
What is Silver?
This element is located in Group 1A and Period 4 on the periodic table.
What is potassium?
In Rutherford’s gold foil experiment, most alpha particles passed straight through the foil because atoms are mostly this.
What is empty space?
The mass number does not appear on the periodic table because it varies due to this reason.
What are isotopes?
This is the atomic symbol for an isotope of an element that has 8 protons and 10 neutrons.
What is ¹⁸₈O?
This mistake would change the identity of an element when writing its symbol, even though the same letters are used.
What is incorrect capitalization?
Between two elements in the same group but different periods and two elements in the same period but different groups, this pair is more chemically alike.
What are the elements in the same group but different periods?
Removing electrons does not significantly change an atom’s mass number because mass number depends only on these particles.
What are protons and neutrons?
Two atoms can share the same mass number but be different elements because they differ in this fundamental atomic property.
What is the number of protons (atomic number)?
Abrilium has two naturally occurring isotopes with mass numbers 67 and 69, and its atomic mass is 67.67 amu; this isotope is more abundant.
What is Abrilium-67?