Atomic Structure Quiz
1. All elements are composed of
Atoms (correct Answer)
compounds
neutrons
molecules
2. What is the mass number of carbon (C)?
12 (correct Answer)
6
13
C
3. How many electrons are in an atom of carbon (C)? (Remember APE! Atomic Number = # of Protons and # of Electrons)
6 (correct Answer)
13
12
C
4. How many electrons are in an atom of carbon (C)? (Remember APE! Atomic Number = # of Protons and # of Electrons)
6 (correct Answer)
12
13
C
5. How many neutrons are in an atom of sodium (Na)? (Remember M-A=N! Mass # – Atomic # = Neutrons)
12 (correct Answer)
6
13
C
6. What is the mass number of sodum (Na)? (Don’t forget to round!)
23 (correct Answer)
6
12
C
7. Atoms of the same element must always have the same number of _________
isotopes
neutrons
Protons (correct Answer)
electrons
8. The dense, positively charged mass located in the center of the atom.
Nucleus (correct Answer)
isotope
proton
9. The _________ of an element equals the number of protons in an atom of that element
atomic number(correct Answer)
isotopes
atomic weight
10. The __________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.
atomic weight
isotope weight
atomic number
mass number(correct Answer)
11. Number of protons in an atom of an element.
atomic mass
isotopes
atomic number(correct Answer)
proton count
12. Where are electrons found in an atom?
in the atomic number
inside the nucleus
outside of the nucleus(correct Answer)
in the electron zone
13. Where are protons and neutrons found in an atom?
inside the nucleus(correct Answer)
in the electron zone
outside of the nucleus
in the atomic number
14. An element will always have the same number of ________.
protons(correct Answer)
atoms
isotopes
neutrons
15. What is the atomic number of gold (Au)?
79(correct Answer)
4
196
Au
16. How many protons does gold (Au) have? (Remember APE! Atomic Number = # of Protons and # of Electrons)
79(correct Answer)
4
196
Au
17. Which atomic particles will you find inside of the nucleus of an atom?
Electron & proton
Proton & Neutron(correct Answer)
Neutron & Electron
18. Which atomic particle has a negative charge?
Electron(correct Answer)
Proton
Neutron
atom
Answer: the smallest particle of an element that keeps its chemical properties
John Dalton
Answer: in the early 1800’s came up with his own atomic model that proposed that all matter is made up of individual particles called atoms which cannot be divided.
Dalton’s theory
Answer: 1. elements are composed of atoms
Answer: 2. atoms of the same element have the same mass (WRONG)
Answer: 3. compounds contain atoms of more than one element
Answer: 4. in a compound, atoms always combine in the same way
J.J. Thompson
Answer: conducted some experiments with electricity and matter. He discovered that electricity consisted of negatively charged particles.
electron
Answer: negatively charged particle
proton
Answer: positively charged particle
neutron
Answer: neutrally charged particle
Ernst Rutherford
Answer: discovered that the nucleus is positively charged because protons are in the nucleus. He did the gold foil experiment.
quarks
Answer: small particles that make up PROTONS and NEUTRONS, each proton/neutron has 3 each
up, down, top, bottom, strange, charm
Answer: types of quarks
3
Answer: a proton or neutron is made up of ___ quarks
mass #
Answer: equals sum of protons and neutrons in an atom, mass number – atomic number = # of neutrons, we get mass number by rounding the average atomic mass
atomic #
Answer: the number of protons in an atom, atom is identified as an element by the number of protons in the nucleus
atomic mass unit
Answer: amu, base on the mass of one carbon atom that has 6 protons and 6 neutrons, 1 amu = 1/12 mass of a carbon atom
1/12
Answer: amu is ___ of a carbon atom
mass of protons + mass of neutrons
Answer: mass of an atom
isotopes
Answer: atoms with the same number of protons but different number of neutrons