Atoms on the periodic table are arranged in ascending order of what?
Atomic Number
100
What sub-atomic particle has a negative charge?
Electron
100
What two sub-atomic particles exist in the nucleus of the atom?
Proton and Neutron
100
What is the element with only one proton?
Hydrogen
100
What element (ion) is responsible for creating acids and bases?
Hydrogen ions, H+
200
Periods on the periodic table go across or down?
Across the table
200
What sub-atomic particle has a positive charge?
Proton
200
What does the atomic number mean?
Number of protons
200
What element has 2 electrons in its first shell and 8 electrons in its second shell?
Neon
200
A low pH means a substance is a/n
Acid
300
Groups on the periodic table go across or down?
Down
300
What sub-atomic particle has a neutral charge?
A neutron
300
How can you calculate the number of electrons?
It is the same as the number of protons (unless a chemical reaction has occurred)
300
I am an element in Group 1, in the second Period, what am I?
Lithium
300
What changes cause different isotopes? Ie. What is different between the Carbon that exists on the periodic table Carbon-12 and the isotope Carbon-14?
The number of neutrons change, Carbon 14 has two more neutrons than Carbon-12
400
Why can atomic weight change?
Atomic weight changes depending on the isotope of that element (how many neutrons it has)
400
What sub-atomic particle has a weight that is very close to zero?
Electron
400
How many electrons can exist in the second shell?
8
400
What is the electron arrangement of Flourine (F)?
2 in the first shell, 7 in the second shell
400
Why do a metal atoms often give off light when placed in a flame?
Electrons jump up to higher energy levels (shells) when placed in a flame which is a source of energy. As they come back down they release energy as light
500
Who proposed the periodic table in the structure it is today?
Mendeleev
500
What contribution to the atomic weight do protons and neutrons have?
They add 1 per proton and neutron (i.e. 1 gram per mole)
500
How can you calculate the number of neutrons?
Take away the atomic number from the atomic mass
500
How would Calcium (Ca) achieve a full outer shell?
Lose 2 electrons
500
Describe the structure (neutrons, protons and electron arrangement) of Oxygen
8 protons and 8 neutrons in the nucleus, 2 electrons in the first shell, 6 electrons in the second shell.