What does the atomic number tell you about an atom?
How many protons are in the nucleus
Whos model of the atom described atoms as solid spheres?
John Dalton
Which types of sub atomic particle are found in the atoms nucleus?
Protons and neutrons
Why are the elements in a compound difficult to seperate?
They are held together with chemical bonds
Which filtration technique could you use to separate water and salt, if you did not want to collect the water?
Evaporation
Which materials are dull brittle and not always solid at room temp [Metal / Non metal]
non metal
Which element has the symbol C?
Carbon
Which materials are strong and malleable [Metal / Non metal]
metals
Would the separating technique chromatography work with an insoluble mixture?
No, it only works with soluble mixtures
What is the relative mass of a neutron?
1
How many electrons can fit in an atom's first shell?
2
Isotopes have the same number of _______ but difference number of _________.
Protons Neutrons
Would the separation technique filtration work if you were trying to separate salt and water?
No, both the water and dissolved salt would pass through the filter.
Most of the alpha particles went straight through the gold atoms is the Rutherford experiment. what did that tell us about the atom?
An atom is mostly empty space
Which group in the periodic table are the Noble gases?
Group 0
What does the mass number tell you about an atom?
The number of protons and neutrons in the nucleus
Which separation technique uses a solvent to dissolve a mixture and absorbent paper to separate it?
Chromatography
Which element has the symbol Zn?
Zinc
Which model of the atom is this?
Rutherford or Nuclear model of the atom
Define a compound.
two or more elements chemically bonded together
What is the relative mass of a proton?
1
What is the separation technique used to separate crude oil into its fractions?
Fractional distillation
What is missing from the Rutherford model of the atom?
Protons and neutrons, electrons in shells
Which model of the atom did this experiment lead to?
Rutherford or nuclear model
Which separation technique could you use to separate salt and water, if you wanted to collect the water?
Distillation
Why are the Halogens so reactive?
They are missing one electron from their outer shell.
Define a mixture
two or more elements together but not chemically bonded.
What is the charge on a pronton?
+1
Some alpha particles were deflected by the gold atoms, what did that tell us about the atom?
The atom has a positive nucleus
How many electrons can fit in an atom's second shell?
8
Which element has the symbol Ca?
Calcium
What is the charge on an electron?
-1
Which separation technique would you use to separate solids from liquids?
Filtration
How many electrons can fit in an atom's third shell?
8
Which element has the symbol F?
fluorine
Which periodic table group are the alkali metals?
1
Which group of the periodic table are the Halogens?
7
What is the charge on a neutron?
0
What is the overall charge on an atom?
0
Why are the alkali metals so reactive?
They only have one electron in their outer shell
The flame test experiment provides evidence that an atom's electrons are in shells [True / False]
True
Which is the most reactive alkali metal out of lithium, sodium and potassium ?
Potassium
Which model of the atom is this?
Plum pudding
Which materials are good conductors [Metal / Non metal]
Metal
Chemical equations must be balance because there must be the same number of atoms on both sides of the equation [True/False]
True
What are the alpha particles being fired at in the Rutherford experiment?
Gold leaf
Why are the noble gases so unreactive?
They have a full outer shell