Atoms
What are the three subatomic particles?
Protons, Neutrons and Electrons
What does the atomic number mean?
Number of protons
What subatomic particle changes to for an isotope?
Neutrons
What are the three types of radioactive decay?
Alpha, Beta and Gamma
Is the pH of an acid below 7 or above 7?
Below
What is the electron shell configuration?
2, 8, 8
What does the atomic mass equal to?
Number of protons and neutrons
What are the two types of ions?
Cations and Anions
What is half-life?
The amount of time it takes for one half of the atom to decay
What substance has a pH of 7?
Water
What is an atom?
The building blocks of life
What are valence electrons?
The electrons found on the outermost shell
What charge does a Magnesium (Mg) ion have?
+2
Which type of radioactive decay does not change the atomic number of an element?
Gamma decay
What indicator tells you the exact pH of a substance?
Universal indicator
Which subatomic particle has the least amount of weight?
Electrons
List an element in the same period as Phosphorus
Sodium, Magnesium, Aluminium, Silicon, Sulfur, Chlorine, Argon
Is Calcium (Ca) an anion or a cation? Explain why?
A cation, because it loses 2 electrons making it more positive
Explain what both Alpha and Beta Decay are
Alpha = ejects 2 protons and 2 neutrons
Beta = neutron converts to a proton and increase the atomic number by 1
What do bases release?
Hydroxide ions (OH-)
How are atoms listed on the Periodic Table?
In order of atomic number (number of protons)
What do groups tell us on the Periodic Table?
The number of valence electrons (electrons on the outermost shell) for elements in that group
How are anions named?
They are named by dropping the end of the name and adding -ide
E.g. Oxide
Carbon-14 has a half life of 5700 years. If a sample initially contains 50 grams of Carbon-14, how much Carbon-14 remains after 17,100 years
6.25 grams
What elements are produced from an acid and metal reaction?
Salt and Hydrogen