Question | Answer |
What is the definition of an atom | An atom is the smallest part of an element that still has the properties of that element |
Name the three parts of an atom | Proton, Neutron, Electron |
Which parts of an atom has an atomic mass of 1amu | Protons and neutrons |
What part of an atom has an atomic mass of 1/1840amu | Electron |
What charge has a proton | Positive |
What charge has an electron | Negative |
What charge has a neutron | Neutral |
Where are protons and neutrons located | In the nucleus |
Where are electrons located | In shells orbiting the nucleus |
What is the atomic number | The atomic number of an atom is the number of protons it has in its nucleus |
What does amu stand for | atomic mass unit |
What is the electronic configuration of an element | This is a way of writing the arrangement of electrons numerically e,g, Sodium, atomic number=11, electronic configuration 2,8,1 |
What is the mass number | The larger number listed below the element symbol in periodic table of elements its equals the number of protons + the number of neutrons |
If an atom of sodium has 11 protons and its mass number is 23, how many neutrons does it have | 12 neutrons |
What is an isotope | Isotopes are atoms of the same element, which have different numbers of neutrons |
What do all elements in group 1 have in common | They all have 1 electron in their outer shell and they behave in a similar manner chemically |
What do all elements in group 8 have in common | They all have a full outer shell and they behave in a similar manner chemically |
How are elements arranged in the periodic table of elements | In order of increasing atomic number |
What do you call the vertical columns in a periodic table | Groups |
What are the Group 1 elements called | Alkali metals |
Name three alkali metals | Lithium, sodium, potassium |
What are group 2 metals called | Alkaline earth metals |
Name two alkaline earth metals | Magnesium and calcium |
What are group 7 elements called | Halogens |
Name two halogens | Fluorine and chlorine |
What are group 8 elements called | Noble gases |
Name two noble gases | Helium and Neon |
What are the horizontal rows in a periodic table called | Periods |
What does the number of periods (rows) in a periodic table represent | The number of shells an atom has |
What is the main division in the periodic table | Metals on the left and middle, non metals on the right |