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What is a substance that cannot be broken down into simpler substance by any chemical process? *

Compound
Element
Mixture
Which of the following best describes a compound? *

It is a combination of two or more different elements
A substance that cannot be broken down into simpler substance by any chemical process.
It is made of a single type of atom.
Which of the following is not an example of an element? *

Carbon dioxide
Hydrogen
Magnesium
Which of the following element is used in making jewelries? *

Chlorine
Lead
Silver
What is the element symbol of Gold? *

Au
Ag
Hg
Which element is needed for bone development and also used in making glasses and cement? *

Aluminum
Calcium
Oxygen
Which element is used in making aircraft wings and food and drink materials? *
1 punto
Aluminum
Calcium
Oxygen
How many different elements are found in a molecule of salt (NaCl)? *

1
2
3
Water (H2O) is an example of compound. What are the two elements present in the molecule of water? *

Helium and Oxygen
Hydrogen and Ozone
Hydrogen and Oxygen