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Help on a Atomic Theory Quiz in science?
Hello, i could use some help on this. dont worry its not graded just a prep, but i want to get the right answers so i can study. any help is appreciated. thanks
Question 1
Which of the following best summarizes the wave mechanical model of atoms?
Question 1 answers
Electrons reside in known positions in fixed orbits around the nucleus.
Electrons are waves that travel in known paths around the protons.
Electrons display some properties of waves and while they reside outside of the nucleus, their positions cannot be known with certainty.
Question 2
Which of the following best summarizes the law of conservation of mass?
Question 2 answers
Matter can be changed but not created or destroyed.
Matter can be destroyed during a chemical reaction.
Matter that gains mass during a chemical reaction is evidence that matter can be created.
Question 3
Thomson suggested a plum pudding model of the atom. In this model
Question 3 answers
the atom has a concentrated positively charged nucleus and electrons that move around it
the atom has a cloud of positive charge with electrons randomly embedded in it
the atom has a central nucleus with electrons that reside in specific energy levels around it
Question 4
Who first suggested that all matter is made of tiny particles called atoms?
Question 4 answers
Robert Boyle
Democritus
Laviosier
Question 5
In the Bohr model of the atom, electrons exist in fixed orbits and they cannot move from one level to another.
Question 5 answers
True
False
Question 6
Describe J. J. Thomson's experiment that led to his discovery of electrons. Explain why this discovery helped us understand the nature of atoms.
Question 7
Which of the following is the best definition of an atom?
Question 7 answers
charged particles that make up all living things
negatively charged particles that flow in electric current
small particles that make up all matter
Question 8
Which of the following particles has mass?
Question 8 answers
protons only
electrons only
both protons and electrons
Question 9
Which of the following best characterizes an electron?
Question 9 answers
negatively charged particle outside the nucleus of an atom
negatively charged particle within the nucleus of an atom
positively charged particle that carries electrical current
Question 10
The nucleus of an atom has a positive charge.
Question 10 answers
True
False
Hello, i could use some help on this. dont worry its not graded just a prep, but i want to get the right answers so i can study. any help is appreciated. thanks
Question 1
Which of the following best summarizes the wave mechanical model of atoms?
Question 1 answers
Electrons reside in known positions in fixed orbits around the nucleus.
Electrons are waves that travel in known paths around the protons.
Electrons display some properties of waves and while they reside outside of the nucleus, their positions cannot be known with certainty.
Question 2
Which of the following best summarizes the law of conservation of mass?
Question 2 answers
Matter can be changed but not created or destroyed.
Matter can be destroyed during a chemical reaction.
Matter that gains mass during a chemical reaction is evidence that matter can be created.
Question 3
Thomson suggested a plum pudding model of the atom. In this model
Question 3 answers
the atom has a concentrated positively charged nucleus and electrons that move around it
the atom has a cloud of positive charge with electrons randomly embedded in it
the atom has a central nucleus with electrons that reside in specific energy levels around it
Question 4
Who first suggested that all matter is made of tiny particles called atoms?
Question 4 answers
Robert Boyle
Democritus
Laviosier
Question 5
In the Bohr model of the atom, electrons exist in fixed orbits and they cannot move from one level to another.
Question 5 answers
True
False
Question 6
Describe J. J. Thomson's experiment that led to his discovery of electrons. Explain why this discovery helped us understand the nature of atoms.
Question 7
Which of the following is the best definition of an atom?
Question 7 answers
charged particles that make up all living things
negatively charged particles that flow in electric current
small particles that make up all matter
Question 8
Which of the following particles has mass?
Question 8 answers
protons only
electrons only
both protons and electrons
Question 9
Which of the following best characterizes an electron?
Question 9 answers
negatively charged particle outside the nucleus of an atom
negatively charged particle within the nucleus of an atom
positively charged particle that carries electrical current
Question 10
The nucleus of an atom has a positive charge.
Question 10 answers
True
False