Science Defintions 🧪🌡️🦠🧫 Flashcards
(42 cards)
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
