Its An Elementary Matter Flashcards
What is the structure of an atom?
Atoms consist of a positively charged nucleus containing protons and neutron with negatively charged particles, electrons, around the outside of the nucleus giving it a neutral charge.
What are properties of metals and what are some examples?
-Forms positive atoms
-Conducts heat/electricity
-might have lustre (shine)
-malleable
-usually melts at high temperature
-Solid (some liquids)
E.g iron,copper
What are some properties of non-metals?
-cant conduct heat /electricity
-usually dull or glassy in appearance
-brittle
-can be a solid, liquid or gas
E.g carbon (diamond), silicone
What are some common compounds?
Carbon monoxide (CO) Carbon dioxide (CO2) Water (H2O)
Why do we have standardised symbols?
Used to label the elements of the periodic table to reduce confusion between people of different languages. The letters often come from the Latin translation of the word.
Why do we have models in science?
Used to explain complex data, events or predict future events. Climate change models predict the effects of climate change using data like the increase in temperature and salinity in oceans.
Why Is the periodic table important?
It is important because it has the elements arranged into groups in columns and sections. An elements position on the table can show what type of elements it is, how reactive it is, if it conduct electricity…
How has technology helped our understanding of the structure and properties of elements?
Scanning tunnelling microscopes allowed humans to see atoms and therefore understand the make up of elements.
What is an element?
A substance that can not be broken down into and simpler substance. Made entirely of one type of atom. Each element is distinguished by its atomic number (number of protons in the nucleus)
What is a mixture?
They are made up of different pure substances mixed together. They can be made up of two or more elements or compounds or a combination of both. The substances that make up a mixture can usually be easily separated.
What is a compound?
Two or more elements joined together by a chemical bond.
What is a molecule?
Two or more atoms held together by chemical bonds.
