Test Flashcards
Another student siad that one of the mean values was incorrect.
Identify the incorrect mean.
Give your reasoning
They used an anomaly at 45 C, 29 is bigger comparing to the other results
State what conclusion can be drawn about the effect of temp on the rate this reaction. Explain your conclusion using particles theory
The higher the temp the faster the reaction occurs as particles have more kinetic energy and move faster increasing the number of successful collisions
The diagram shows and action of element x
Boron
2 shell
3 outer
Group 3
Period 2
Draw the electronic structure of the element directly below element X in the periodic table
Aluminium (Al)
11 x
3 circles
Use the equation to work out the formula of sodium thiosulfate
Na2S2O2
The symbol (aq) in the equation tells us that the substances are aqueous what is meant by this
That they are/can be dissolved in water
Use information from the equation to explain why cross disappears
Sulfur starts to form into a solid and all the solid practices makes the water appear milky making the cross hard to see
The particles labelled X are called
Electrons
The part of the atom labelled Y is called the
Nucleus
It contains particles called ________ and ____
Protions and neutrons
Draw a line from each particle to the charge of that particle
Proton ——— +1
Neutron———-0
Electron———- -1
The boundary beteeen the nazca and South American plates is a destructive plate boundary. Describe what happens at a destructive boundary
Plates move towards each other. Denser plate forced downwards forming mountain and volcanoes
Draw a cross on the diagram to show a constructive plate boundary describe what happens at this boundary
Plates separate forming a gap Magma rises and cools in the atmosphere and creates new igneous rock ( the x is inbetween the South American plate and African plate)
State one effect of plates sliding past each other
Earthquakes
Give the letters if two particles which are isotopes of the same element explain your answer
B and D
Same number of portions but different neutrons
Give the letters of two particles which are ions explain your answer
A and F
A has more electrons than protons and f has more protons than electrons
Give the observations made during the reactions of lithium, sodium and potassium with water. Explain the trend in reactivity in terms of electronic structure
Lithium fizzes/effervescence and moves across the surface of the water.
Sodium does the same as lithium however it also melts into a ball. Potassium does the same however it also produces lilac flame. Each reaction happens more vigorous as you move down the group as the outer electrons are further from the nucleus meaning they can easily gain or lose a electron to get a fuller outer shell
Use the letters A-E to complete the following sentence
1.the atoms ground in group 5 are _______ and _____
2. The atoms an atomic number of 7 is _____
3. The atom that is an inert gas is _____
4. The atoms found in period 2 are______ and _____
- A and B
- B
- C
- D and B
