Biology Chapter 2.1

How many nuetrons do carbon-12 and carbon-13 have

Carbon-12 contains 6 neutrons while carbon-13 contains 7 nuetrons

How many electrons do elements in groups 1 14 and 17 need to gain or lose to achieve a stable configuration

Elements of group 1 need to lose one electron, elements of group 14 need to gain 4 electrons, and elements of group 17 need to gain 1 electron

Different forms of an element that have the same number of protons but a different number of neutrons are called

isotopes

The group 18 helium, neon, and argon all have filled outer electron shell, making it unnecessary for them to share electrons with other atoms to attain stability; they are highly stable single atoms. Their non-reactivity has resulted in their name being

noble gases

Charge and location of a proton

+, nucleus

Neoan has a total of ten electrons. which configuration below would those electrons take

2 in level 1s 2 in level 2s 6 in level 2p

This chemical reaction HCO- + H+H2CO3- = CO2 + H2O happens in which part of the body

Blood

The only atom that does not contain neutrons is

Hydrogen

When an atom gains or loses an electron what kind of bond is created.

Ionic

The periodic table was devised by Russian chemist Dimitri

Mendelevee

What four common elements are in all living things

O,C,H,N

Based on carbon dating, scientists estimate this pygmy mammoth died 11,000 years ago. How would the ratio of C-14 to C-12 in the living elephant compare to that of the mammoth

The ratio would be higher in the elephant than the mammoth.

The smallest unit of matter that retain all their characteristic are most stable when their outermost or valence electron shells contain teh maximum number of electrons are known as

atoms

Molecular oxygen as shown in the figure consists of two doubly bonded oxygen atoms and is not classified as a compound but as a

homonuclear molecule

In _______ reactions, reactants are turned into products, but when the concentration of product goes beyond a certain threshold, some of these products and reactants are reversed. This back and forth continues until a certain relative balance between reactants and products occurs- a state called equilibrium

reversable