Chemistry #1 🧑🔬 Flashcards
What is an element?
An element is a substance made up of one kind of atom.
What is a compound?
A compound is a substance made up of two or more different elements chemically bonded together.
What is the difference between a physical change and a chemical change?
A physical change does not change the identity of a substance, while a chemical change does.
What is the periodic table?
The periodic table is a arrangement of all known elements based on their atomic number and electron configurations.
What are the three states of matter?
The three states of matter are solid, liquid, and gas.
What is the difference between an acid and a base?
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An acid is a substance that donates hydrogen ions, while a base is a substance that accepts hydrogen ions.
What is the chemical formula for water?
H2O
It consists of two hydrogen atoms and one oxygen atom, which are bonded together covalently to form a molecule.
What is the difference between an atom and a molecule?
An atom is the smallest unit of an element that retains its chemical properties, while a molecule is a combination of two or more atoms held together by chemical bonds.
What is the law of conservation of mass?
The law of conservation of mass states that in a chemical reaction, mass is neither created nor destroyed.
What is the difference between an exothermic and endothermic reaction?
An exothermic reaction releases heat, while an endothermic reaction absorbs heat.
What is an ionic bond?
An ionic bond is a chemical bond formed by the transfer of electrons between atoms ⚛️
What is a catalyst?
A catalyst is a substance that speeds up a chemical reaction.
