Homework - metals, non metals and reactions

Homework - metals, non metals and reactions

Where can the symbols of elements be found?

1. On the periodic table
2. In the sky
3. On road signs
4. In the dictionary

How many types of atoms make up an element?

1. No atoms, just energy
2. Just one type of atom
3. Multiple combinations of atoms
4. Two different types of atoms

What type of letter is used in the symbol of an element?

1. All lowercase letters
2. Either one capital letter or two letters with the first being capital
3. Two capital letters
4. A combination of capital and lowercase letters

How are elements represented on the periodic table?

1. They are represented by their color
2. Each has its own recognized symbol
3. They are represented by their melting point
4. They are represented by their atomic weight

What is an element?

1. A substance made up of two types of atoms
2. A compound made of multiple elements
3. A mixture of different types of atoms
4. A substance made up of one type of atom

Which of the following is a characteristic of non-metals?

1. Good conductors of heat and electricity
2. Brittle
3. Shiny
4. Malleable

What property distinguishes non-metals from metals?

1. Poor conductors of heat and electricity
2. Ductile
3. High melting point
4. Shiny

Which element is a non-metal?

1. Hydrogen
2. Copper
3. Iron
4. Silver

Where are non-metals located on the periodic table?

1. On the left
2. In the centre
3. On the right
4. In the top row

Which of the following is a characteristic of metals?

1. Good conductors of electricity and heat
2. Low melting point
3. Dull
4. Brittle

What does the reactivity series show?

1. Density of each metal
2. Weight of each metal
3. How vigorously each metal reacts
4. Color of each metal

What causes fizzing when a metal reacts with an acid?

1. Oxygen being produced
2. Hydrogen gas being produced
3. Salt being formed
4. Carbon dioxide being produced

What happens to the piece of metal when it reacts with an acid?

1. Gets larger
2. Disappears
3. Gets smaller
4. Remains the same

What is formed when a metal reacts with an acid?

1. Salt
2. Water
3. Oxygen
4. Sugar

Which gas is produced when a metal reacts with an acid?

1. Nitrogen
2. Carbon dioxide
3. Oxygen
4. Hydrogen

What is the general equation for the oxidation reaction of metals with oxygen?

1. metal + oxygen → metal sulfide
2. metal + oxygen → metal hydroxide
3. oxygen + metal → metal oxide
4. metal + oxygen → metal oxide

What are metal oxides usually classified as?

1. gases and acids
2. liquids and acids
3. solids and bases
4. solids and acids

Which type of oxidation reaction involves a slow process of forming a layer of metal oxide?

1. combustion (burning)
2. oxidation reduction
3. tarnishing or rusting
4. corrosion

What is required for the combustion (burning) oxidation reaction to occur?

1. sunlight
2. strong wind
3. heat or a spark
4. cold water

What is the product of the reaction between potassium and oxygen?

1. potassium oxide
2. potassium hydroxide
3. potassium chloride
4. potassium sulfide

This marine alga is the first known eukaryote to pull nitrogen from air

Until now, the only “nitrogen-fixing” organisms were thought to be prokaryotes such as bacteria. 

When the bacterium started living inside the alga about 100 million years ago it has since evolved into a nitrogen-harvesting machine for its host. Once a symbiont, it’s now one of the cell’s many organelles.

What type of organism was originally thought to be the only 'nitrogen-fixing' organism?

1. Prokaryotes such as bacteria
2. Plants
3. Fungi
4. Eukaryotes such as algae

When did the bacterium start living inside the alga?

1. About 1 billion years ago
2. About 500 million years ago
3. About 10 million years ago
4. About 100 million years ago

What has the bacterium evolved into for its host?

1. A photosynthesis enhancer
2. A water-purifying agent
3. A nitrogen-harvesting machine
4. A carbon dioxide extractor