Metals like sodium and potassium are very hard and cannot be cut knife easily. No worries!
Carbon is hard non-metal it cannot be cut easily with a knife as they have stronger covalent bonds.
Sodium belongs to alkali group metal(first group of the periodic table) and it can easily be cut with a knife.
Lithium, sodium and potassium are all soft metals that are easily cut with a scalpel or knife.
Metals like Gold and Iron are hard and dense . They are malleable and ductile. They are very tough and it's nearly impossible to be cut with a knife.
Metals like sodium and potassium are very hard and cannot be cut knife easily. No worries!
The material like Titanium, Stain steel and Inconel are considered difficult to cut metals. The difficult to cut metals require tough cutting edges to reduce the tool wear and to get smooth surface finish and product size.
Step 1: Cutting Aluminium Sheet
Sheet aluminium can be cut without the need for a guillotine or tin-snips which tend to deform the metal. With the aid of a straight-edge and a sharp knife "score" BOTH sides of the aluminium sheet. This weakens the aluminium and creates a "fracture line".
Sodium is silver white color metal with malleable and ductile property. It is the metal that can easily be cut with a knife. It is a good conductor of heat and electricity.
Alkali metals (lithium, sodium, potassium) are so soft that they can be cut with a knife.
A sharp knife will cut whether it is carbon or stainless steel.
The correct Answer is CLead can be cut with a knife and scratched with finger nail, as lead is quite soft.
Diamond is known to be the hardest material on earth. Some concrete – natural or manmade like sapphire, diamonds, metals used in high-grade vaults, etc, may be challenging to cut through but it can be done. It is difficult to find any type of concrete that modern cutters cannot cut.
A "non-cuttable" metamaterial made of aluminum foam and ceramic resists all but shallow cuts. While other, less-destructible materials rely on physics like distributing force, Proteus uses vibration.
That title belongs to blades made of obsidian, a kind of volcanic glass that can be crafted into an edge with an edge radius just 3 nanometers across. That's just dozens of atoms thick, making it one of the sharpest objects we know of in terms of edge radius.
Gold is the most malleable of all metals and soft enough to be cut with a knife.
Zinc sheet metal can be cut with a variety of different tools. A sharp knife or pair of scissors can be used to score the metal and then snap it along the scored line. A power saw can also be used, but it is important to use a blade designed for cutting metal to avoid damaging the tool.
Physical Properties of Iron
Pure iron is silvery-white, easy to work with and you can cut through using a knife.
Magnesium, though not easily, can be cut with a knife.
A hacksaw is mainly used for cutting thin metal such as aluminum, brass, steel, or copper. Hacksaws are also used for cutting plastics such as PVC, PEX, or ABS on pipes or on sheet goods made of PVC, polystyrene, and more.
Tungsten, which is Swedish for "heavy stone," is the strongest metal in the world.
Vanadium carbides are among the hardest that form in steel, and chromium carbides are in between iron carbide and vanadium carbide.
While aluminium doesn't rust, it does corrode. The aluminium oxide coating is highly resistant and renews itself if damaged keeping the metal relatively safe from corrosion. But some factors can cause the coat to become unstable, thus exposing the metal.