Basic safety rules
Chemical elements and compounds
Atom and molecule
Density
Air and its composition
2
Lab coat, glasses and protective gloves.
What is chemist's essential equpiment?
2
Fe
What is the chemical symbol for iron?
2
The number of valence electrons.
What does number of group tell us?
2
Mass of a substance divided by its volume.
What is density?
2
Nitrogen, oxygen, noble gases.
What are the components of the air of constant quantity?
4
Flush both eyes with water, remove the contact lenses, call the ambulance.
What is the first aid in case of eye exposure to the hazardous substances?
4
Al2O3
What is the chemical formula for aluminium oxide?
4
Negatively charged particle.
What is an electron?
4
Temperature
On which factor does density depend on?
4
78%
What is the volume percentage of nitrogen in the air?
6
Pictograms
What tells us about the dangers related to working with a chemical substance?
6
It consists of groups and periods.
How is periodic table built?
6
Electrons, neutrons and protons.
What are the components of an atom?
6
Measuring cylinder
What can we use to measure the volume of a liquid?
6
Chemical compound consisting of an oxygen atom (atoms) and atoms of other metals/non - metals.
What is an oxide?
10
What is the pictogram used for compressed gases?
10
Ancient heroes, geographical places, famous scientists.
What are elements named after?
10
An atom with additional electron/electrons.
What is an anion?
10
Density tower
How can we demonstrate densities of substances?
10
Absorbing water from its surroundings.
What does it mean to be hygroscpic?
15
What is the pictogram used for oxidizing substances?
15
Sodium, potassium, calcium, magnesium.
Give examples of metals.
15
Dipole
A molecule with separated positive and negative charge.
15
Density is higher than 5 g/cm3.
What density do heavy metals have?
15
White with a purple - blue cast.
What is the colour of xenon exposed to the electrical discharges?