Extensive Reading-Book B Unit 20 (K)

20 카드 | CompassPublishing

세트공유

charged

충전하다
My phone went dead during a very important conversation because the battery was not charged.

column

세로칸
The elements on a periodic chart that are in the same column have the same number of electrons.

electrons

전자
An element has the same number of protons as electrons.

elements

원소
As of 2006, scientist know of 117 elements.

horizontally

수평으로
As part of his physical therapy, he was required to lie horizontally for 20 hours a day.

intervals

간격
Most dentists recommend that you get your teeth cleaned at regular intervals--usually every six months.

isotopes

동위원소
An isotope of hydrogen called deuterium has one neutron.

negatively

음전기로
The negatively charged particle of an element is called the electron.

neutrons

중성자
You can figure out the number of neutrons by subtracting the atomic number from the mass number.

noble

부식하지 않는
There are six noble gases on the periodic table; they rarely react with other elements.

nucleus

원자핵
The nucleus of an atom is usually made up of protons and neutrons.

particles

초미립자
The atom is the smallest indivisible particle of matter.

periodic table

주기율표
Every student that studies chemistry has to become familiar with the periodic table.

positively

양전기로
The positively charged particle of an element is called the proton.

properties

특성
Many scientists attempted to study the properties of his mind; they were curious to know what made him so intelligent.

protons

양자
The number of protons in an atom determines the atomic number of a chemical element.

respectively

각각
The first and second prizes went to Tom and Jerry, respectively.

revolve

회전하다
The Earth revolves around the sun.

shell

전자각
A shell can be any seven energy levels on which an electron may exist within an atom.

vertical

수직의
The vertical blinds made the house look bigger.