Scientific Method
What are the steps of the scientific method?
Question/Problem
Research
Hypothesis
Experiment
Collect and Analyze Data
Conclusion
What is the element symbol for lead?
Pb
Which family of elements is known for their brittle and dull qualities?
Non-Metals
Which force has the least effect on atoms?
Gravitational
Which family of elements reacts very violently with water?
Alkali Metals
IV, DV
What element is known as the symbol Hg?
Mercury
Which family of elements is known for their ability to form halides or salts?
Halogens
Which force is responsible for radioactive decay?
Weak Force
What do groups indicate and what do periods indicate?
Group- valence electrons
Period- energy levels
What type of graph is used to show a change over time?
Line Graph
What is the lewis dot structure for oxygen
see diagram
Which family is known for their ability to act both like metals and non-metals?
Metalloids
Which force is responsible for keeping the nucleus together?
Strong Force
What is the difference between an ion and an isotope?
Ion- gain or lose an electron
Isotope-gain or lose a neutron
Why are there constants on an experiment?
To keep the experiment valid to make sure that the outcome is ONLY due to the IV and not any outside influence.
This element has 5 valence electrons, 4 energy levels, and is a metalloid
Arsenic
Which family is known for its radioactive elements where only 3 of which can be found naturally on Earth?
Actinide Series
Which force is responsible for keeping the electrons orbiting in their energy levels? Explain what is occurring?
The electromagnetic force.
There is an attraction between electrons and protons and a repulsion between each electron
As you go down a group, what happens to the reactivity of the elements generally?
Reactivity increases generally
The Paws company developed a new formula of dog food that is supposed to help with mass loss. Their original formula is readily available so they needed to do testing before releasing this new formula in the market. The scientists test 100 male and female french bulldogs (50 each). They tested 25 with the new formula, 25 with the original formula, 25 with their grain free variety, and the last 25 with their isolated protein blend. At the beginning each dog’s mass was recorded and at the end of 6 months their masses were again record. Each owner was told to feed their dogs ½ cup of food 2 times a day to their dogs at 8am and 8pm everyday. What is the IV, DV, Constant, and Control?
IV: Formula of Dog Food
DV: Mass of the dog
Constant: Breed of dog, how much food, how many times a day, etc.
Control: Original formula
Draw the bohr diagram for Phosphorous
See diagram
Which family is known as the rare earth metals?
Lanthanide Series
In the weak force, a neutron can decay into what two particles?
A proton and an electron
Name the 2 types of ions and explain how they got their changes?
Cation- Loses an electron to become more positive
Anion-Gains and electron to become more negative