Science - 1 Flashcards
What are 5 laboratory rules?
Safety glasses, no running, hair tied up, no eating, no drinking
What is biology?
The study of living organisms and how they interact with their environment
What is chemistry?
Focuses on the properties and behaviour of matter
What is physics?
Studying the relationship of objects, forces, and motions
What is planet earth and beyond?
The earth
what is the structure of an atom?
The protons and neutrons are in the nucleus, well electrons are surrounding it in the shell
What are the difference between the 3 subatomic particles?
Protons have a positive charge
Neutrons have no charge
Electrons have a negative charge
How do you find protons, neutrons, and electrons from the periodic table?
Protons and neutrons are found in the atomic number, electrons are atomic number - the mass number
What is an ion?
An atom/group of atoms that have an electric charge
What is the role of electrons in chemical reactions/ the ionic bond?
Metal elements lose electrons to form positive ions (cations). Non-metal elements gain electrons to form negative ions (anions).
How do you find the atoms in an element?
By getting the atomic number
What are reactants?
The substance that reacts
What are products?
Substance formed as a result of a reaction
What is conserved during a chemical reaction?
Matter
Why do you balance an equation?
To make sure the law of conservation mass is upheld
Define chemical change:
a change causing a new substance
define a compound:
substance caused by a chemical bond
define element:
substance made by a single atom which cannot be broken down
define mixture:
two or more substances
define molecule:
smallest unit of substance
define physical change:
where the physical properties of matter change e.g colour or smell
define subatomic particle
particle smaller then an atom
what are valance electrons?
electrons in the outer shell of an atom
What is the unit for acceleration?
ms-2
