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yes, of course.
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What is a boring unreactive metal which is not udes in pencil?
While there are many metals that are not used in pencils, the one you are thinking of is probably lead. The part of the pencil known as the lead is actually a mixture of graphite (a form of carbon) and clay, rather than actual lead.
Can eating pencil lead kill you in ten years?
If lead pencils were the ONLY thing you ate, it would kill you in a lot less time than that. Pencils do contain some digestible fiber (in the wood), while the graphite "lead" doesn't provide much in the way of nutrition. The "lead" in a pencil is actually not the element lead, which can be toxic; it is graphite, which is powdered carbon. Eating one pencil "lead" is pointless, but harmless.
Why is the head of a hammer made of iron and not lead?
Apart from being very much heavier than iron, lead is also very much softer than iron, so lead wouldn't last long if used as a hammer.
Why is the head of a hammer made from iron why not lead?
Apart from being very much heavier than iron, lead is also very much softer than iron, so lead wouldn't last long if used as a hammer.
Is pencil lead a compound or an element or an homogeneous mixture or a heterogeneous mixture?
Pencil lead is actually not lead (Pb) at all, but it is graphite. And graphite is simply carbons atoms. So, no, it is NOT a compound mixture.
How can you test if lead in a pencil is harder than lead metal itself?
The 'lead' or graphite in a pencil is softer. Try writing on paper, the pencil will write, the real lead will not
What is a form of calcium carbonate softer than marble but harder than chalk?
Limestone is softer than marble, but harder than chalk.
Is a No. 1 pencil harder or softer than a No. 2 pencil?
It's softer. #1 softest, #2 slightly harder, #3 harder than #2, etc.Softer.a #1 pencil is softer than a#2 pencil
Explain Why blackboards are not scratched by chalk but by the sand embedded in the chalk?
Blackboards are not scratched by chalk because chalk is softer than the material from which the blackboard is constructed. Sand scratches blackboards because it is harder than the material from which a blackboard is made.
Which is a softer lead 6b or a 8b?
b stands for black. 8b is blacker (softer) than 6b.
Is lead hard?
The "lead" in drawing pencils has various grades or hardness. The hardness of a drawing pencil is designated by a number and an H. The higher the number the harder the pencil is, the slower it wears done, the longer it retains its point, the less it smudges and the lighter the line is that is drawn. For example, 6H pencils are harder than 2H pencils. The softness of a pencil is designated by a number and a B. The higher the number the softer the pencil is, the faster it wears down, the easier it is to smudge and blend, and the darker the line is that is drawn. For example 8B pencils are softer than 2B pencils. There is a standard, middle of the road pencil, the HB pencil, sometimes called the Number two pencil. This has some of the drawing qualities of both hard and soft pencils and in a pinch will serve for most drawing and writing needs.
Why is sedimentary rocks used for chalk in class rooms?
Because it has a softer rating than then board so the rock leaves a streak.
Why can you use chalk to write on the blackboard but not granite?
Chalk is softer than the slate (real or artificial) used on blackboards, so it will flake off as you write. Granite is harder than slate and will not flake, but rather cut into or mark the slate permanently.
If there is a number two pencil is there a number three pencil?
That would depend if the pencil were an H or a B. Artist pencils are identified with a number and a letter. H is for hard. A 6H pencil would be harder than a 4H pencil. B is for soft. A 6B pencil would be softer than a 4B pencil.
What is the difference between an hb 2 pencil and a hb pencils?
HB 2 pencil has a slightly softer lead than a regular HB pencil, which gives it darker markings. The "2" in HB 2 stands for the American grading system, while the regular HB is based on the European grading system. Both are commonly used for general writing and drawing.
Why do we call graphite pencil lead pencil?
When graphite was first discovered it was thought to be a kind of black lead, rather than a form of carbon. It was quickly found to easily make marks, but brittle and needed support. The wooden lead pencil was born
Do mehcanical pencil lasts longer than a wooden pencil?
Yes it does, if you take good care of it, but you have to keep adding lead.
