Science Defintions 🧪🌡️🦠🧫 Flashcards
What is matter?
Anything that has mass and takes up space.
What is an atom?
Building block to all matter, smallest unit in which matter can be divided into.
How are substances composed of atoms?
Atoms form molecules
Summarise the development of the atomic model.
It took 5 people to get the model to the stage it is now with the last modification in 1927 by Erwin Schrödinger.
Recall the names of the scientists who made major contributions to the development of the atomic model.
1803 John Dalton, 1904 J.J. Thompson, 1911 Ernest Rutherford, 1913 Neil Bohr, 1927 Erwin Schrödinger.
How are atoms different for each element
Each element has different types of atoms varying with atomic number and mass.
Atoms are _____ charged all over?
Neutrally
The number of protons equals the number of ________?
Electrons
What are the subatomic particles inside and atom?
- electrons
- protons
- neutrons
Where can electrons be found in an atom?
In the shells surrounding the nucleus.
Where can protons be found in an atom?
In the nucleus.
Where can neutrons be found in an atom?
In the nucleus
What is an element?
A pure substance made up of one type of atom
What is a molecule
Atoms bonded together to form clusters
Describe the structure of a lattice.
A grid like structure. All connected like dot to dots.
What is the formula for O2
Oxygen 2
What is the formula for H2
Hydrogen 2
What is the formula for Cl2
Chlorine 2
Is this a metal bendy and doesn’t conduct electricity?
No
Is this a metal shiny and conducts electricity
Yes
What is a compound
A substance of two or more different types of elements bonded together.
What is an element
Pure substance made of 1 type of atom
What is a molecule
Elements bonded together
What is a compound
Two or more substances bonded together
What is H2O
Water
What is C6 H12 O6
Glucose
What is CH4
Methane
What is NH3
Ammonia
What is CO2
Carbon dioxide
What is CO
Carbon monoxide
What is Na Cl
Sodium chloride
What is the formula for H2O
2 hydrogen 1 oxygen
What is the formula for C6 H12 O6
Carbon 6 Hydrogen 12 Oxygen6
What is the formula for NH3
1 Nitrogen 3 Hydrogen
What is the formula for CH4
1 carbon 4 hydrogen
What is the formula for CO2
1 carbon 2 oxygen
What is the formula for CO
1 carbon 1 oxygen
What is the formula for NaCl
1 sodium 1 chloride
What is a physical change
A change in the physical property of a substance that is reversible and where no new substances are made
What is chemical change
A change in which atoms are rearranged to create new substance usually irreversible
What are physical changes
Easily reversed
No new products made
Reactants remain
Often a change of state
What are chemical changes
Not easily reversed
New product(s) are formed
Reactants used up
May produce heat, light, bubble
May produce electricity
