Question

What are the three subatomic particles that make up an atom?

A. Nucleus, Electrons & Protons
B. Electrons & Neutrons, Protons
C. Neutrons & Nucleus
Inside of the nucleus there are protons and neutrons.
A.True
B.False
Which statement below is true?
A.Neutrons are positive, Protons are negative, and Electrons are neutral
B.Electrons are positive, Neutrons are negative, and Protons are neutral
C.Protons are positive, Electrons are negative, and Neutrons are neutral
The atomic number can tell us how many neutrons are in an atom.
A.True
B.False
The mass number is equal to which of the following?
A.Protons + Neutrons
B.Protons + Atomic Number
C.Neutrons + Electrons
D.Protons - Neutrons
In order to calculate how many neutrons are in an atom, you must subtract the mass number from the number of protons? Neutrons = Mass # - Protons
A.True
B.False
If I have an element with a mass of 56 and it has 26 protons, how many neutrons does it have?
A.26
B.56
C.30
D.82
Isotopes are atoms with the SAME number of protons, but DIFFERENT numbers of neutrons.
A.True
B.False
Please have your periodic table of elements. An atom has 8 protons and 9 neutrons, what is the chemical symbol for this isotope?
A.Flourine F-17
B.Oxygen O-17
How many protons and neutrons does iron-56 have?
A.26 protons and 56 neutrons
B.26 protons and 26 neutrons
C.30 protons and 56 neutrons
D.26 protons and 30 neutrons
Neil Bohr's model of the atom suggested that electrons are found in distinct paths.
A.True
B.False
Electrons closer to the nucleus have more energy.
A.True
B.False
Which of the following statements about valence electrons are true?
A.They are in the outermost orbital and have the least energy.
B.They are in the outermost orbital and have the most energy.
C.They are in the innermost orbital and have the most energy.
D.They are in the innermost orbital and have the least energy.
A specific, electrically neutral atom of boron has 5 protons, 5 electrons, and 6 neutrons. What is the mass number of this atom of boron?
A5
B.6
C.11
D.16
An atom has 17 protons and 18 neutrons. Which symbol represents that atom, including its mass number?
A.Cl-32
B.Cl-35
C.S-34
D.Ar-33
Given that oxygen has an atomic number of 8. How many protons and neutrons are in the isotope 16O, or oxygen-16?
A.8 protons and 8 neutrons
B.16 protons and 16 neutrons
C.8 protons and 7 neutrons
D.16 protons and 8 neutrons
Silicon (atomic number 14) has three isotopes: 28Si, 29Si, and 30Si. What is the number of protons in an atom of silicon with the highest mass number?
A.30
B.29
C.14
D.16

Answer 1

1. A. Nucleus, Electrons & Protons

2. A. True

3. C. Protons are positive, Electrons are negative, and Neutrons are neutral

4. B. False

5. A. Protons + Neutrons

6. A. True

7. C. 30

8. A. True

9. A. True

10. A. True

11. A. They are in the outermost orbital and have the least energy.

12. C. 11

13. B. Cl-35

14. A. 8 protons and 8 neutrons

15. A. 30

Step-by-step explanation:

Atoms consist of protons, neutrons, and electrons. The nucleus contains protons and neutrons, not electrons. Protons are positive, electrons are negative, and neutrons are neutral. The atomic number specifies the number of protons, not neutrons. The mass number equals protons plus neutrons. To find neutrons, subtract the atomic number from the mass number. An element with a mass of 56 and 26 protons has 30 neutrons. Isotopes have the same number of protons but different numbers of neutrons. For an atom with 8 protons and 9 neutrons, the symbol is Oxygen O-17. Iron-56 contains 26 protons and 30 neutrons.

Bohr suggested electrons orbit in specific paths. Electrons closer to the nucleus possess less energy. Valence electrons occupy the outermost orbital and have the least energy. Boron with 5 protons, 6 neutrons has a mass number of 11. Chlorine with 17 protons and 18 neutrons is denoted as Cl-35. Oxygen-16 contains 8 protons and 8 neutrons. The silicon isotope with the highest mass number, 30Si, has 14 protons.