Chemical Elements: properties (symbols to names)

Question 1

This silvery-white metal is used as a fuel in nuclear reactors, generating electric power.

Accepted Answer

uranium

Question 2

Used in pigments, and in high-strength, high-temperature steel alloys.

Accepted Answer

cobalt

Question 3

Used in light emitting diodes and semiconductors, just like silicon above it.

Accepted Answer

germanium

Question 4

Used as a disinfectant, its crystals sublimate into a violet vapour when heated.

Accepted Answer

iodine

Question 5

This colourless, inert gas glows pale peach when an electric current runs through it.

Accepted Answer

helium

Question 6

Incredibly useful in industry for wiring, heat sinks, coins and in brass and bronze alloys.

Accepted Answer

copper

Question 7

A noble gas, it's inert and colourless until an electric current excites it to a sky-blue glow.

Accepted Answer

argon

Question 8

Liquid at room temperature, it evaporates rapidly into a choking purple-brown gas.

Accepted Answer

bromine

Question 9

Used in battery production and pigments, its use is decreasing due to toxicity.

Accepted Answer

cadmium

Question 10

With the highest melting point of all the elements, this metal is used in light bulb filaments.

Accepted Answer

tungsten

Question 11

Widely used in self-luminous clock and watch hands, until discovered to be radioactive.

Accepted Answer

radium

Question 12

This metal is strong and lightweight, but expensive and toxic.

Accepted Answer

beryllium

Question 13

This blue-gray metal is used in capacitors in high-tech electronic devices.

Accepted Answer

tantalum

Question 14

Soft, malleable and heavy it has the highest atomic number of all the stable elements.

Accepted Answer

lead

Question 15

Essential for living organisms, compounds of this metal are found in teeth and bones.

Accepted Answer

calcium

Question 16

This colourless gas makes up 21% of the atmosphere, and liquifies at -183 oC.

Accepted Answer

oxygen

Question 17

Used in thermometers, it's the only metal element liquid at room temperature.

Accepted Answer

mercury

Question 18

This metal is very reactive with water, generating heat and igniting the produced hydrogen.

Accepted Answer

potassium

Question 19

This silvery-white metal is mined in Sudbury, Ontario and used in coins.

Accepted Answer

nickel

Question 20

This pale yellow gas reacts violently with virtually everything, including glass.

Accepted Answer

fluorine

Question 21

This metal resists corrosion, and can be added to steel to make stainless steel.

Accepted Answer

chromium

Question 22

This element is found as opaque black graphite as well as transparent diamond.

Accepted Answer

carbon

Question 23

A lustrous gray metalloid, its alloys are used in solders, bullets and plain bearings.

Accepted Answer

antimony

Question 24

It's the most abundant metal in the Earth's crust, and found in over 270 different minerals.

Accepted Answer

aluminum

Question 25

This lustrous metal can be combined with other metals to produce strong, lightweight alloys.

Accepted Answer

titanium

Question 26

Commonly used in galvanization, coating iron or steel to protect against corrosion.

Accepted Answer

zinc

Question 27

This silvery-gray metal resembles iron and is a required trace mineral for living organisms.

Accepted Answer

manganese

Question 28

This inert gas glows a pale mauve colour when excited with a high voltage electric current.

Accepted Answer

krypton

Question 29

This odorless, colorless gas, produced from elements in granite, is radioactive.

Accepted Answer

radon

Question 30

Highly toxic, this metalloid was the poison of choice until detection became easy.

Accepted Answer

arsenic

Question 31

It is grown into large single crystals, cut into wafers, then used to create computer chips.

Accepted Answer

silicon

Question 32

Compounds of this soft silvery metal are added to fireworks to impart a green colour.

Accepted Answer

barium

Question 33

This silvery-gold alkali metal melts at 28 oC and is extremely reactive and pyrophoric.

Accepted Answer

cesium

Question 34

This inert gas, when excited by a high voltage discharge, glows a pale violet colour.

Accepted Answer

xenon

Question 35

One of the few elements found pure in nature, it's also called brimstone.

Accepted Answer

sulfur

Question 36

By mass, the most common element on Earth, it has been used since ancient times.

Accepted Answer

iron

Question 37

This metal occurs in red, white and black forms. The red allotrope is found in matches.

Accepted Answer

phosphorus

Question 38

This soft silvery metal turns white in seconds, when exposed to air.

Accepted Answer

sodium

Question 39

An expensive metal, so resistant to corrosion and oxidation that it's considered a noble metal.

Accepted Answer

platinum

Question 40

A pale yellow-green gas, it's used as a disinfectant for drinking water and in swimming pools.

Accepted Answer

chlorine

Question 41

With compounds used in electronics, this metal will melt in your hand, liquifying at 30o C.

Accepted Answer

gallium

Question 42

A highly valued precious metal for coinage and jewelry since the beginning of recorded history.

Accepted Answer

gold

Question 43

Used in cosmetics and pharmaceuticals, it can form big beautiful crystals when pure.

Accepted Answer

bismuth

Question 44

Found in the common mineral borax, it is rarely seen in pure form.

Accepted Answer

boron

Question 45

More abundant than gold, this precious metal had been used in coins since antiquity.

Accepted Answer

silver

Question 46

This colourless gas makes up 75% of the visible universe.

Accepted Answer

hydrogen

Question 47

This lightest metal floats on water, skittering around releasing hydrogen.

Accepted Answer

lithium

Question 48

This radioactive metal can provide power to spacecraft and artificial heart pacemakers.

Accepted Answer

plutonium

Question 49

This low toxicity metal is used in many alloys, such as bronze and pewter.

Accepted Answer

tin

Question 50

This inert gas gives off a characteristic bright red when ionized by a high current.

Accepted Answer

neon

Question 51

This metal burns with a brilliant-white light, making it a useful ingredient in flares.

Accepted Answer

magnesium

Question 52

This colourless gas makes up 78% of the atmosphere, and condenses to a liquid at -196 oC.

Accepted Answer

nitrogen

Chemical Elements: properties (symbols to names)

Questions 52

Chemical Elements: properties (symbols to names)

Questions 52