Which of the following best describes an atom?
A protons and electrons grouped together in a random pattern
B protons and electrons grouped together in an alternating pattern
C a core of protons and neutrons surrounded by electrons
D a core of electrons and neutrons surrounded by protons
. A researcher wants to experiment with an element that reacts like phosphorus (P) but has a greater atomic mass. Which element should the researcher select for the experiment (use the periodic table)?
A Nitrogen (N)
B Sulfur(S)
C Arsenic (As)
D Silicon (Si
The table above shows the number of protons in an atom of four different elements. According to the periodic table, which of these elements is a metal?
A. T
B. Q
C. X
D. Z
If the dartboard below is used to model an atom, which subatomic particles would be located at Z?
A. protons and electrons
B. electrons and magnetrons
C. neutrons and electrons
D. protons and neutrons
When trying to identify an unknown element, a scientist determines what other elements the unknown element reacts with chemically. Which property of the unknown element determines the other elements it reacts with?
A. The total number of neutrons in the unknown element
B. The total number of particles in the nucleus of the unknown element
C. The number of protons in the nucleus of the unknown element
D. The number of valence electrons in the unknown element
The following chemical equation shows the incomplete formula for burning methanol. The question mark represents the unknown number of oxygen (O2) molecules. How many molecules of O2 are needed to balance this chemical equation?
1
3
5
6
thxs bob222-arrow
thx bob222 a i cant put tables up here
and**
Ollie! What did I say about telling people your secret identity?!
Hahahaha thx peeps
1. Your book is the best place to get this information or google.
2. I don't see a picture of a dartboard.
3. Look this up in Google and see how the valence electrons behave.
4. Look at the periodic table. Generally the elements in the same column have similar chemical properties. For example, pick the element just beneath P.
5. I don't see a table.
6. Google or you tube gives tutorials on balancing questioins.
I shall be happy to critique your answers but no guesses.