Lab Safety
When in the Classroom or Lab,Running
what is never permitted
What is the symbol for gold
Au
What are the building blocks of matter
Atoms
What do scientist use to predict the locations of electrons in atoms
ratios and proportions
what is a scientific theory
A theory summarizes patterns in nature
If there is an emergency in the classroom
follow the teachers instructions
What does not apply to metals appearance and form
they are brittle
which conversion would be used to change 18 km to meters
A.100m/1km B.1km/1000m C.100m/1km D. 1km/100
A.1000m/1km
The region in which a electron is most likely to be located is
the electron cloud
how do scientist universally communicate
They use Si
if the teacher is injured or unconscious
Get assistance
Most reactive elements tend to have how many valence electrons.
1,7
What type of graph is used to show how a part of something relates to the whole
What is a circle graph
Which statement about electrons and electron orbitals is not true
a orbital can only contain max 2 electrons
A measurement must include a number and
SI Unit
Follow evacuation instructions
If an atom of Germanium has a mass number of 70 and a atomic number of 32 how many neutrons are in its nucleus.
38 nuetrons
A material that is malleable and conducts electricity is
a metal
A statement that accurately represents the arrangement of electrons in the Bohr's model
Electrons travel around the nucleus in fixed energy levels with energies that vary from level to level
the two types of change
Chemical and physical
Never use electricity or electrical equipment near
water
a alkaline metal has 1 electron while a alkali earth metal has
2
The elements on the periodic table are arranged according to
Increasing atomic number/mass
electrons have what kind of charge
negative
An experiment in which only one variable is controlled,the manipulated variable, is changed at a time
A controlled experiment