23 Questions
What is the fundamental unit of an element that can participate in chemical reactions?
Atom
What is the term for the dense central core within an atom?
Nucleus
According to Dalton's atomic theory, what happens to atoms during a chemical reaction?
Atoms are rearranged or combined
What is the characteristic of atoms of the same element?
Same size, mass, and chemical properties
What is the composition of compounds?
Atoms of more than one element
What is the distinguishing characteristic of a cation?
It has a net positive charge
Which of the following is an example of a polyatomic molecule?
H2O
What is the term for an ion with a negative charge?
Anion
Which of the following groups of elements are classified as reactive metals?
1A, 2A, 3A (unless H)
What is the term for a molecule that contains only two atoms?
Diatomic molecule
What is the term for an ion that contains only one atom?
Monatomic ion
What is the number of electrons in the ion 27 3+ Al?
10
What is the formula of an ionic compound that consists of a combination of cations and anions?
The same as the empirical formula
What is the characteristic of neutrons in the nucleus?
Electrically neutral
What is the definition of an acid?
A substance that yields hydrogen ions (H+) when dissolved in water
What is the formula for calculating the mass number of an atom?
Number of protons + number of neutrons
What is the difference between an ionic compound and a molecular compound?
Ionic compounds are formed between metals and nonmetals, while molecular compounds are formed between nonmetals
Where can metalloids be found in the periodic table?
Between metals and nonmetals
What is the definition of isotopes?
Atoms of the same element with different numbers of neutrons
What is the definition of an oxoacid?
An acid that contains hydrogen, oxygen, and another element
Where can nonmetals be found in the periodic table?
On the right side of the periodic table
What is the sum of the charges on the cation(s) and anion(s) in each formula unit of an ionic compound?
0
What is a characteristic of all metals?
They are all luster and have high electric and heat conductivity
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