matter
what is matter
anything that takes up space
what elements is Au
what is gold
what is the chemical formula for water
what is H2O
what is the charge of an electron.
what is negative
what is an atom
what is the smallest unit of ordinary matter that forms a chemical element
why do solids have a fixed shape
the particles are in one place
in mendeleevs periodic classifation, what is the number of groups?
8
the smallest particle of water is
A. element
B. atom
C. molecule
D. neutron
what is C: molecule
what revolves around the nucleus.
what is electrons
what is the atomic number of helium
what is 2
in which state of matter do particles have the most energy. solid, liquid, gas
what is gas
group 1 elemetns are called:
a. alkali metals
b.noble gases
c.chalogens
d.halogens
what is a: alkali metals
The formula that shows the number and kind of atoms which a substance of a molecule contained, is known as
A. chemical formula
what is A: chemical formula
What is the magnitude of charge of electrons?
what is the atomic number of Barium
A. 53
B. 54
C. 55
D. 56
what is D: 56
which theory describes the arrangement and movement of particles in solids. liquids and gases.
kinetic theory
How many series' of transition elements are present in the periodic table
what is four
Rusting of iron involves a chemical reaction which is a combination of
A. Reduction as well as combination reactions
B. Oxidation as well as combination reactions
C. Reduction as well as displacement reactions
D. Oxidation as well as displacement reactions
Who discovered electrons?
what is A: J J Thomson
A proton has approximately the same mass as ____.
what is a neutron
what is sublimation
when a solid turns into a gas
the periodic functions of the ______ are the properties of respective elements.
what is atomic weights
what is the chemical formula for ammonia
what is NH3
Who explained the photoelectric effect?
What is C: Einstein
What is the atomic number of Chlorine
what is 1/16