Chemistry
What is the negatively charged particle?
Electron
What is the slightly negative charge in water
why do hydrogen bonding occurs between water molecules
Opposite charges on water molecules attract each other
A scientist studies an unknown substance and discovers it has mass and takes up space. Based on this
evidence, the scientist can conclude that the substance is
Matter
A coastal city experiences smaller temperature changes than a desert located inland. Which property of water BEST explains this difference?
High specific heat
This type of covalent bond occurs when electrons are shared unequally between atoms with different electronegativities.
Polar Covalent bond
What is the slightly positive charge on water
Hydrogen
Why does water have surface tension?
Cohesion holds water molecules tightly together
A student builds a model atom using colored beads. The student places positively charged particles in the center with neutral particles. Which part of the atom is the studen
Nucleus
Which statement correctly identifies the solvent in a saltwater solution
Water is the solvent because it does the dissolving
A group of atoms bonded together is a(n):
Molecule
What gives water its properties ?
Polarity!
Water sticks to the inside of a glass graduated cylinder, causing the edges of the water to curve upward.
Which property of water is being observed?
Adhesion
During a chemical reaction, one atom transfers electrons to another atom. What type of bond is most likely forming?
Why is water often called the “universal solvent”?
It can dissolve more substances than any other liquid
This type of bond forms when atoms share electrons.
Covalent Bonds
Hydrophobic means
water fearing
A plant is able to move water from its roots to its leaves through tiny tubes in the stem. What process
makes this possible?
Capillary action
Which group of elements are MOST important in living organisms?
Carbon, hydrogen, oxygen, nitrogen
Why does water move from the roots to the leaves of plants?
Capillary Action
Which particle(s) are found in an atom's nucleus?
Protons and Neutrons
Hydrophilic means
water loving
During winter, fish are able to survive beneath a frozen pond. Why is this
Ice floats and forms an insulating layer on the surface
A student notices that oil floats on water and does not mix, even after stirring. Which statement best explains why this happens?
Oil is nonpolar, and water is polar
Spiders that can walk on the surface of the water.
Surface tension