Random
Most of the biosphere (living things) are made up of H O N C. H O N C stands for...
Hydrogen, oxygen, nitrogen, and carbon.
What is the chemical symbol for Hydrogen?
H
How many atoms in C6H12O6
24
What is an element?
A pure substance that cannot be broken down into a simpler material without losing it's properties
Is Chlorine an element, compound or mixture?
Element
The most abundant element in ocean water (Think about what water is made of!)
Oxygen
What is the chemical symbol for lead?
Pb
How many elements in C6H12O6
3
What are atoms?
The building blocks of all matter, smallest unit
Is N2 an element, compound or mixture?
Element
Identify the compound: Carbon(C), Chlorine(Cl), Iodine(I), ammonia(NH3)
Ammonia
What is the atomic number for oxygen?
8
How many elements in NaCl?
2
What is the term for the 1-2 letters that represent an element on the periodic table?
A chemical symbol
Is H2O a compound, element or mixture?
Compound
Identify the element: Carbon Dioxide(CO2) Water(H2O) Oxygen gas(O2) Sodium Chloride(NaCl)
Oxygen
How can you determine the number of protons in an element?
Atomic number
How many protons in Carbon?
6
What is a compound?
A substance made of two or more different elements.
Is wet sand an element, compound or mixture?
Mixture
Distinguish between an atom and a molecule.
An atom is a singular element, whereas a molecule is made of 2 or more elements (these elements can be the same or different)
What is the atomic mass based on?
Neutrons + Protons
How many electrons in an atom of Calcium?
20
What is a pure substance?
- Consists of only one type of element or compound.
- It is not a mixture.
- Cannot be separated into smaller components by physical means
Is sugar dissolved in water an element, mixture or compound?
Mixture (homogeneous mixture = solution)