C1: Quiz 10 – Answers
1) Atomic mass and the chemical & physical properties
2) When scientists created the periodic table, they noticed that a periodic pattern was created
3) Iodine (I) and tellurium (Te)
Or Argon (Ar) and Potassium (K)
4) Yes – Mendeleev left gaps for elements that were yet to be discovered
5) Isotopes have the same number of protons and a different number of neutrons
Or isotopes have the same atomic number and a different atomic mass
6) The subatomic particles that all atoms are made from were yet to be discovered; the subatomic particles are protons, neutrons and electrons
2) When scientists created the periodic table, they noticed that a periodic pattern was created
3) Iodine (I) and tellurium (Te)
Or Argon (Ar) and Potassium (K)
4) Yes – Mendeleev left gaps for elements that were yet to be discovered
5) Isotopes have the same number of protons and a different number of neutrons
Or isotopes have the same atomic number and a different atomic mass
6) The subatomic particles that all atoms are made from were yet to be discovered; the subatomic particles are protons, neutrons and electrons
Questions
1) Before Mendeleev created his periodic table, how were the different elements arranged in the periodic table?
2) Why was the periodic table known as the periodic table?
3) Mendeleev did not always strictly follow the atomic mass rule and instead used a combination of atomic mass and properties of the element to determine the element’s position in the periodic table. Give an example of where he did this.
4) Did Mendeleev leave gaps for elements that had yet to be discovered? Answer yes or no.
5) The discovery of isotopes showed that Mendeleev was correct to not order the elements based solely on atomic mass. What is the definition of an isotope?
6) Today, we order the elements in the periodic table based on atomic number (the number of protons). How come early scientists that developed the periodic table used atomic mass and not atomic number?
1) Before Mendeleev created his periodic table, how were the different elements arranged in the periodic table?
2) Why was the periodic table known as the periodic table?
3) Mendeleev did not always strictly follow the atomic mass rule and instead used a combination of atomic mass and properties of the element to determine the element’s position in the periodic table. Give an example of where he did this.
4) Did Mendeleev leave gaps for elements that had yet to be discovered? Answer yes or no.
5) The discovery of isotopes showed that Mendeleev was correct to not order the elements based solely on atomic mass. What is the definition of an isotope?
6) Today, we order the elements in the periodic table based on atomic number (the number of protons). How come early scientists that developed the periodic table used atomic mass and not atomic number?