chemists
what is considered as first chemists?
Alchemists
what is the first soap made of?
it was mixed up fat and wood ash.
what is everything in the universe made of? including human beings?
Atoms.
what is shiny, hard, and doesn't bounce when it his the floor?
metal.
what is the nick name of nitrous oxide?
Laughing gas.
where did the alchemy start?
in ancient Greece and China.
what chemical might be poisonous for humans but it is good for making fertilizer?
phosphates.
nucleus and electrons.
electrons are running around nucleus in atomic obritals.
what is the metal that is liquid at room temperature?
mercury
how many tones of gas have been released after world war I?
125,000
what is the trick that you should not try to warm a liquid like old alchemist?
Surround a jar of the liquid with horse manure.
why pressure cooker cooks things faster?
it allows water to boil at higher temperature than usual.
how many elements you can find on Earth?
list a few most common elements you can find in your life.
92
Carbon
oxygen, hydrogen, calcium, iron, gold, silver
what is the horrible details about acid that you can find in the book?
don't go near some of the acids, which are strong enough to dissolve a human body.
True or False
during world war II, a german chemist discovered how to make fat from oil.
True
what is the easiest metal that can turn into gold? and why we don't do in this way?
Platinum.
because it is even more expensive than gold!
what kind of water is called "hard water" and do people like it or not?
if there is a lot of calcium and magnesium in the water, it is called "hard water"
boiling hard water changes the dissolved chemicals into not dissolved, that's how you get a disgusting deposit of limescale.
what are the 3 states that chemical can changes?
solid, liquid and gas.
why diamonds are clear?
cause diamonds don't contain other chemicals.
what are the common things used by contemporary chemists? list 3.
Test tubes, Thermometer, flasks, funnels, filter paper, hot plates, droppers.
what chemical you need to make bread? and what makes it special? what else can it be used in food industry?
Yeast is used to make bread and it is special because it is no mere chemical, it is ALIVE.
yeast eats up the sugar and produce alcohol and carbon dioxide, it also can be used in making wine from grape juice.
list the top 4 most horrible gas in order
1. chlorine
2. ozone
3. methane
4. fluorine
how to put an egg that is slightly larger than the bottle opening into the bottle.
soak the egg in the vinegar for 2 days, which makes the shell thinner and softer but look the same, (acid dissolves some calcium in the shell), then you can squeeze the egg carefully into a bottle.