1.1 Atoms Flashcards
What is an element?
Relatively small number of substances are made up of only one type of atom. This substances are called elements.
What is an atom?
Smallest particle of a chemical element that can exist.
All substances are made of tiny particles called what..?
Atoms
How much variety of atoms are there?
100 different types of atom found naturally on Earth.
What happens when the atoms combine?
It gives huge variety of ways , giving all those different substances,
How much variety of elements are there?
100 different types of elements naturally found.
Do elements have different properties?
Yes
What elements are shiny , solid metals?
- Silver
- Chromium
- Copper
- Gold
What elements are non-metals and gases at room temperature?
- Oxygen
- Nitrogen
- Argon
- Chlorine
What is the definition of chemical symbols?
It is the name used for an element depends on the language being spoken.
What is an example of chemical symbols in different languages?
Element sulfur is called schwefel in German and azufre in Spanish.
How do scientists publish their findings from different countries?
Forms a global community and scientists from many nations communicate each other and publish their findings.
Where are the alkali metals in the periodic table?
All of group 1
Where are the alkaline earth metals in the periodic table?
All of group 2
Where is the transition metals located?
Centre of the periodic table
Where are the noble gases in the periodic table?
All of group 0
Where are the halogens in the periodic table?
All of group 7
Where are the lanthanides located?
On the first line from the end of the periodic table
Where are the actindes located?
Second line from the end of the periodic table
What does the symbols in the periodic table represent?
Represents the atoms
What is the meaning of groups in the periodic table?
The elements are arranged in columns called groups.
Each group will contains elements with similar chemical properties,
What does the ‘staircase’ drawn on the right of the periodic table mean?
It splits between metals and non-metals.
Left : Line of metals
Right: Non-metals
What are the few elements called that are lying next to the dividing line?
Metalloids or semi metals.
Why are they called metalloids/semi-metals?
They have some metallic and some non-metallic properties
What are the example of metalloids/semi metals?
- Silicon
- Germanium
What is the definition of a compound?
Made up of different atom bonded together.
What is a definition of a molecule?
A grouping of two or more atoms bonded together.
Explain water molecule structure?
It’s chemical bonds that holds the hydrogen and oxygen atoms together in the water molecule.
What are atoms made up of?
Central nucleus and electrons orbiting around it.
