![]() So first, first of all, let us get an idea about the element, the limited appeal substance that consists of the same type of atoms, the same type of patterns if it has it is an element compound is a pure substance which has two or more types of atoms, two or more types of different items could be. Since this corresponds to the same order we find in the chemical formula (CaCO 3: CaCO) with no symbols added nor missing, we are reasonably confident that our answer is plausible.Ĭalcium carbonate is made up of the elements calcium, carbon and oxygen.Which says that we have to identify each of the following items below as an element to compound or mixture. See if you can arrange these chemical symbols like they are displayed in the chemical formula: Use the periodic table to find the symbol of each element you named: (ii) Use the periodic table of the elements to find the name of the element corresponding to each chemical symbol: ![]() (i) Break the chemical formula up into the symbols of the elements: (ii) The chemical formula of the compound includes the symbol of each element found in the compound. (i) Compounds are made up of 2 or more elements. Name the elements found in calcium carbonate, CaCO 3 Name the elements found in the compound calcium carbonate. It doesn't matter whether you refer to it as oxygen gas, liquid oxygen, or solid oxygen, it all refers to the element oxygen.Ĭalcium carbonate (chemical formula CaCO 3) is found in limestone. If you look in the periodic table of the elements you will find oxygen (O) listed as an element. Oxygen gas (chemical formula O 2) is made up ONLY of the element oxygen (chemical symbol O) (ii) Compounds can be decomposed into simpler substances because they are made up of 2 or more elements. (i) Elements cannot be decomposed into simpler substances because they are made up of only one element. What is the relationship between what you know and what you need to find out? ![]() What information have you been given in the question? Oxygen gas (chemical formula O 2) makes up about 21% of the Earth's atmosphere.ĭecide whether oxygen gas is an element or a compound. The most common elements found in living things are:
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