Two observations:
1. I don't see any attempt on your part to answer any part of the 20 questions.\
2. Are you trying to use up as much space as possible. You've even made it inconvenient to read the questions. I assume this is a test and you want us to do the test for you.
1. How many periods are there in the periodic table? *
1 point
6
7
8
9
2. How many groups are there in the periodic table? *
1 point
15
16
17
18
3. State the number of valence electrons in an atom of Sulfur. *
1 point
2
4
6
8
4. State the number of valence electrons in an atom of Calcium. *
1 point
2
4
6
8
5. State the number of valence electrons in an atom of Chlorine. *
1 point
1
3
5
7
6. State the number of valence electrons in an atom of Arsenic. *
1 point
1
3
5
7
7. Give the name and symbol for the element that corresponds to atomic number 10. *
1 point
Boron, B
Nitrogen, N
Neon, Ne
Nickel, Ni
8. Give the name and symbol for the element that corresponds to atomic number 18. *
1 point
Fluorine, Fl
Argon, Ar
Arsenic, As
Silver, Ag
9. Give the name and symbol for the element that corresponds to atomic number 36. *
1 point
Krypton, Kr
Potassium, K
Palladium, Pd
Xenon, Xe
10. Give the name and symbol for the element that corresponds to atomic number 90. *
1 point
Titanium, Ti
Zirconium, Zr
Thallium, Tl
Thorium, Th
11. Which of the following pairs of elements belong to the same period? *
1 point
Na and Cl
Na and Li
Na and Cu
Na and Ne
12. Which of the following pairs of elements belong to the same group? *
1 point
H and He
Li and Be
C and Pb
Ga and Ge
13. An element found in period 4 would have how many energy levels/shells? *
1 point
Three
Four
Five
Six
14. What group number(s) are the transition elements in? *
1 point
Group 1
Group 2
Groups 3-12
Group 8
15. Why would you expect strontium to be chemically more similar to calcium? *
1 point
They are in the same family/group.
They are in the same period.
They have the same atomic number.
They have the same atomic mass.
16. What is the heaviest noble gas? *
1 point
Helium
Radon
Flourine
Astatine
17. What is the heaviest alkaline earth metal? *
1 point
Hydrogen
Beryllium
Francium
Radium
18. 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? *
1 point
Nitrogen (N)
Sulfur (S)
Arsenic (As)
Silicon (Si)
19. A model of an atom is shown below. Which element is represented by this model of an atom? *
1 point
Boron (B)
Carbon (C)
Neon (Ne)
Sodium (Na)
20. A chemist made the table below to record some atomic properties of four elements. Based on the information in the table, which conclusion about the chemical reactivity of these elements is valid? *
1 point
Boron is the most reactive because it has the most protons.
Fluorine is the most reactive because it has 7 electrons in the outer shell.
Silicon is the most reactive because it has an equal number of protons and neutrons.
Gallium is the most reactive because it has many more neutrons than protons.
2 answers
Its really good
1 answer