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Chemistry
Chemistry chapter 2
Question | Answer |
---|---|
The neutral particle found within an atom is the ? | Neutron |
The sum of the protons and neutrons in the nucleus of an atom is called the? | Mass number |
The space around the nucleus where the atom's electrons are found is called the ? | Electron cloud |
The positively charged central core of an atom is what? | Nucleus |
A system used to represent the valence electrons around the chemical symbol of an element is the ? | Lewis dot structure |
The positively charged subatomic particle is an ? | proton |
The range of all forms of radiant energy is given the name ? | Electromagnetic spectrum |
The region of space where electrons of a certain energy move about the nucleus of an atom is ? | Orbital |
The smallest particle of which matter consists is an ? | Element |
Found in the outer energy level of an atom is what? | Atom |
The number of protons in the nucleus of an atom of an element is the what of the element? | atomic |
A negatively charged particle found in all atoms is the ? | Electron |
Questions | Answers |
Name and describe the present day model of the atom? | The present day model of the atom is called the electron cloud. |
What charges do a proton, neutron and electron have? | +1, Zero, and -1 |
Which particles are located in the nucleus? | The proton and neutron |
Which particle contribute the most to an atom's mass? | The proton and neutron. |
What is an isotope? | Each different version of an element is called an isotope. |
What is an ion? | When an atom has more electron than protons, or few electrons than protons. It will have a charge, that is an ion. |
Can you change the number of protons in an atom and have the same element? |