Which of the following is true about protons?

Protons are found in the nucleus, have a positive charge and a mass of 1 amu (atomic mass unit)

Protons have a positive charge, found outside the nucleus and have 1 amu (atomic mass unit).

Protons have a negative charge, found outside the nucleus and have 1 amu (atomic mass unit)

Protons have no charge and are found in the nucleus and have a mass of 1 amu.

Complete the following: Element # of protons # of neutrons Atomic mass (amu) Atomic number Number of electrons W 38 49 X Y Z

W = Element is Strontium, X = 87; Y = 38 and Z = 38

W = Element is Indium , X = 87; Y = 49 and Z = 38

W = Element is Indium , X = 87; Y = 49 and Z = 49

W = Element is Strontium, X = 87; Y = 38 and Z = 39

In a neutral atom, which two subatomic particles must be equal in number?

Protons, neutrons and electrons

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Charges of subatomic particles; separating substances, basic Bohr model

Questions and Answers

1.

Which of the following is true about protons?
- A.
  
  Protons have a positive charge, found outside the nucleus and have 1 amu (atomic mass unit).
- B.
  
  Protons are found in the nucleus, have a positive charge and a mass of 1 amu (atomic mass unit)
- C.
  
  Protons have a negative charge, found outside the nucleus and have 1 amu (atomic mass unit)
- D.
  
  Protons have no charge and are found in the nucleus and have a mass of 1 amu.
Correct Answer
B. Protons are found in the nucleus, have a positive charge and a mass of 1 amu (atomic mass unit)
2.

Which is a possible correct Bohr model for Carbon? (Use a periodic table for reference).
- A.
  
  Option 1
- B.
  
  Option 2
- C.
  
  Option 3
Correct Answer
A. Option 1
3.

Complete the following: Element # of protons # of neutrons Atomic mass (amu) Atomic number Number of electrons W 38 49 X Y Z
- A.
  
  W = Element is Indium , X = 87; Y = 49 and Z = 38
- B.
  
  W = Element is Indium , X = 87; Y = 49 and Z = 49
- C.
  
  W = Element is Strontium, X = 87; Y = 38 and Z = 38
- D.
  
  W = Element is Strontium, X = 87; Y = 38 and Z = 39
Correct Answer
C. W = Element is Strontium, X = 87; Y = 38 and Z = 38
4.

In a neutral atom, which two subatomic particles must be equal in number?
- A.
  
  Protons and electrons
- B.
  
  Protons and neutrons
- C.
  
  Neutrons and electrons
- D.
  
  Protons, neutrons and electrons
Correct Answer
A. Protons and electrons
5.

Sodium, when neutral, will have 11 electrons and 11 protons. What will its charge be if it loses 1 electron?
- A.
  
  -1
- B.
  
  +1
- C.
  
  +2
- D.
  
  -1
Correct Answer
B. +1

Explanation
(11+) and (11-) changes to 11 + and 10 -.

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6.

Which method of separation would work best to separate the components of blood?
- A.
  
  Distillation
- B.
  
  Filtration
- C.
  
  Chromatography
- D.
  
  Centrifuge
Correct Answer
D. Centrifuge

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Dec 15, 2013

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Dec 14, 2013

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Basic Chemistry

Which of the following is true about protons?

Which is a possible correct Bohr model for Carbon? (Use a periodic table for reference).

Complete the following: Element # of protons # of neutrons Atomic mass (amu) Atomic number Number of electrons W 38 49 X Y Z

In a neutral atom, which two subatomic particles must be equal in number?

Sodium, when neutral, will have 11 electrons and 11 protons. What will its charge be if it loses 1 electron?

Which method of separation would work best to separate the components of blood?