more chemistry difficulties?

Question

1: In a neutral atom, the number of electrons equals ____________.
ions
protons
neutrons
none of the above


2: A neutral atom that contains 92 protons contains _______ electrons.
92
46
29
none of the above


3: Elements that have 8 electrons in their outer shell are most likely to be ___________.
stable
unstable
both 1 and 2
neither 1 nor 2


4: Isotopes have the same number of electrons but different ________.
protons
neutrons
sizes
none of the above


5: The atomic weight of an atom is equal to the number of protons plus the number of ________.
energies
isotopes
neutrons
none of the above


6: The unit of electricity in an atom is the electric ___________.
charge
magnetism
energies
none of the above


7: An electrically charged atom is called a(n) __________.
proton
neutron
ion
none of the above


8: Atoms that have the same number of protons but different numbers of neutrons are called ____________.
isotopes
similar
neutral
none of the above


9: Elements which have lost an electron are called
protons
ions
neutrons
none of the above


10: What is the charge of an electron?
positive
negative
neutral
none of the above


11: What is the charge of a proton?
positive
negative
neutral
none of the above


12: In an atom, the protons and neutrons are found ___________.
in the nucleus of the atom
in the atom's outer shell
both 1 and 2
none of the above


13: In an atom, the electrons are found in __________.
nucleus
the atom's electron shells
both of the above
none of the above


14: The Electron Theory was developed by ____________.
Albert Einstein
John Dalton
Aristotle
none of the above


15: What is the process of oxidation?
The electron jumps to another electron shell.
The atom gains an electron.
The atom loses or gives up an electron to another atom.
none of the above


16: In chemistry we often read the periodic table. What is a vertical column called?
a period
a group
both 1 and 2
none of the above


17: When reading the periodic table, a horizontal row of elements is called ____________.
a period
a group
both 1 and 2
none of the above


18: Generally speaking, how would you describe the chemical activity of a group of elements as you go down a column in the periodic table?
The chemical activity among the elements in the vertical row increases.
The chemical activity among the elements in the vertical row decreases.
remains about the same
none of the above


19: During chemical changes the number of neutrons in the nucleus of atoms______.
increases
decreases
remains the same
none of the above


20: What is a chemical reaction?
It depends on the number of neutrons.
It depends on the number of protons.
It's hard to tell.
Atoms of the same or different elements either share electrons, gain, or lose electrons.

Answer 1

These questions are extremely easy. Quit being lazy and read your textbook or look them up. If you don't learn this stuff yourself now, you'll be screwed when you go on to more complicated material.

Answer 2

I find that one of the biggest things my students stuggle with is all the math. A lot of them just don't understand dimensional analysis and why chemists use it to solve problems. I have parents who say to me all the time that they don't understand why their child is doing bad in chemistry when they did great in biology. I have to explain to them that it is completely different and a lot of times its the math. The best thing to do when teaching chemistry is to try to get the students involved and interested. I do this by trying to relate things to real life and real examples. It's also good to do lots of demos and labs. I find that the students enjoy labs a lot (of course, they hate the lab reports!) and it's a good way to involve the students in what they are learning.

Answer 3

I marked ones I'm unsure of with ?
1. protons
2. 92
3. stable
4. neutrons
5. neutrons
6. charge?
7. ion
8. isotopes
9. ion
10. negative
11. positive
12. in the nucleus
13. electron shells
14. Dalton?
15. lossing/giving up an electron to another atom
16. group
17. period
18. increases
19. remains the same
20. atoms share, gain, lose electrons

Answer 4

These are really basic questions that form the foundation of chemistry. Try to figure out the answers on your own or you'll end up falling behind.

Answer 5

Not even a typo to pretend you didn't copy & paste your homework questions on here. They're easy. Read the book.

Answer 6

uh......wow.......
i just learned about this last week and now i cant remember any of it