Question 1: What is the chemical symbol for sodium?
Responses
1) Na
2) N
3) NA
4) sodium
1) Na
Question 2: How many protons does one atom of boron have?(1 point)
Responses
1) 5
2) 6
3) 10
4)10.81
1) 5
Question 3: What is the atomic number of carbon?(1 point)
Responses
1) 6
2) 12
3) 12.011
1) 6
what is the modle for C2H6 labled
The model for C2H6 is called ethane.
Think about the models shown above. What colors are used to represent the different elements?
(3 points)
The white spheres represent
hydrogen
atoms. The red spheres represent
oxygen
atoms. The grey spheres represent
carbon
atoms.
The colors used to represent the different elements in the models are:
- White spheres: Hydrogen atoms
- Red spheres: Oxygen atoms
- Grey spheres: Carbon atoms
Deanne and Bo conduct an experiment at school. They put vinegar into a dish, and then they add baking soda to it. Lots of bubbles form as they stir the two substances together. After the bubbling stops, they notice that they no longer smell the distinctive odor of vinegar. Their teacher explains that the atoms making the vinegar and the atoms making the baking soda were recombined to form water, carbon dioxide, and another compound called sodium acetate.
Which of the following pieces of evidence helped Deanne and Bo answer question a?
A) A solid dissolved in a liquid
B) A new gas was formed.
C) An odor changed.
D) They saw a new color.