Periodic Table
Vertical columns on the periodic table are called?
What are groups?
Symbol for Helium is ……
What is He?
A homogeneous mixture made of two or more substances is ………
What is solution?
Forces that hold atoms together are ……
What is chemical bonds?
Element that gives off energy in the form of rays and particles is ……
What is a radioactive element?
Horizontal rows in the periodic table of elements are ………
What are Periods?
Located to the right of Alkali metals and not as reactive are
What is Alkaline Earth Metals?
What is solvent?
Anything which is man-made
What is Synthetic?
The amount of time it takes for half an isotope in a sample to decay by emitting radiation.
What is Half-life?
A chemical composition for salt can be written as NaCl.
What element is Na?
What is Sodium?
Located to the right of Alkali metals and not as reactive are
What is Alkaline Earth Metals?
A substance present before a chemical change.
What is Reactant?
Fuels from recently living organisms:
What is Biofuel?
Particles made of 2 protons and 2 neutrons and are heavy and slow:
What is Alpha particles?
In group 1 of the periodic table and are very reactive are the ……
What is Alkali metals?
In the nucleus of an atom are the …… and ……
What is the protons and neutrons?
A mixture made of parts that separate upon standing like oil and vinegar.
What is Suspension?
A reaction between an acid and a base to form salt and water is ……
What is neutralization reaction?
Atoms with same number of protons but different number of neutrons:
What is Isotope?
………… orbits the nucleus of an atom.
What is electron?
The pair who helped discover the radioactive elements Polonium and Radium
What is Marie and Pierre?
3Fe + O2 —> Fe3O4
Balanced or Not Balanced?
What is Not Balanced?
Important organic compounds in the body for cell growth and repair
What is Protein?
When two nuclei with a smaller mass merge to form a stronger nucleus while releasing energy.
What is nuclear fusion?