They say so because all the evidence so far seems to indicate that this is so. Read about the "Law of conservation of energy" for more details - for example, on the Wikipedia.
This principle, known as the Law of Conservation of Mass, was proposed by Antoine Lavoisier, a French chemist, in the late 18th century. He formulated this idea based on his experiments with chemical reactions.
it was isolated by two british scientist Lord Rayleigh and Sir William Ramsay
The Irish chemist who proposed the modern atomic theory is John Dalton. He introduced this theory in the early 19th century, which states that all matter is composed of tiny, indivisible particles called atoms.
Perspex, a type of acrylic plastic, was invented by British chemist Rowland Hill and German chemist Otto Röhm in the 1930s. Röhm went on to found a company called Röhm and Haas to commercially produce and market this material.
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A Chemist. :)
oenologist
Chemist Bio-tech is more specific Chemist has more chances of employment - or moving from one company to another.
A druggist can be known as an apothecary, pharmacist or chemist.
It is the coloring in your skin. Ask a biologist, or chemist or another scientist.
In the past, 'drugist' or 'chemist' was often used.
Chemist Lab Technician $29,000 Process Development Chemist $63,000 Analytical Chemist $44,000 Lab Technician Chemist $37,000 Pharmaceutical Analytical Chemist $37,000 Environmental Chemist $38,000 Entry Hplc Chemist $27,000 Analytical Research Chemist $40,000 Senior Chemist $65,000 Production Chemist $36,000 GC MS Chemist $39,000 QC Chemist $35,000 Organic Chemist $44,000 Pharmaceutical Chemist $35,000 R&d Chemist $45,000
Analytical chemist Biochemist Chemical engineer Environmental chemist Food chemist Forensic chemist Materials scientist Medicinal chemist Nanotechnologist Petrochemical engineer Pharmaceutical chemist Process chemist Quality control chemist Toxicologist Water chemist Agrichemist Polymer chemist Geochemist Flavor chemist Sustainable chemist.
A chemist. In Britain, anyway. I'm not sure about anywhere else. Or a pharmacy.
drug store Chemist (uk) apothecary's
The plural is 'Chemists'. The singular is 'Chemist'.
A chemist is most likely to have a job such as Analytical Chemist, Research Chemist, or Quality Control Chemist.