Atoms (Parts Of)
Electrons have a negative charge
What is true?
Electrons surround the nucleus and they do have negative charge. Joseph John Thompson's experiments revealed this in 1897
What is put a balloon on each end of a stick and hold the stick straight horizontally then fill one balloon with air, and see if the stick tilts in that direction?
The date of and person who created the periodic table
What is February 17th, 1869 and Dimitri Ivanovich Mendeleev?
On February 17th, 1869, Dimitri Ivanovich Mendeleev, a Russian professor of chemistry, completed the periodic table, the first of his numerous periodic charts.
The number of elements on the periodic table
What is 118?
On the most recent periodic table, there is 118 elements. Since the first one created by Dimitri Ivanovich Mendeleev, 55 new elements have been discovered. (Mendeleev had 63 elements on his table)
Wood is a compound
What is false?
Wood isn't even an element-it can't be a compound.
The basic part of all matter
What is an atom?
Democritus, a student of Leucippus, (the man who first developed the idea of an atom) named the basic part of all matter the atom.
Everything is matter
What is true?
Everything weighs something, (has volume) and everything takes up space. So, everything is matter.
Copper isn't on the periodic table
What is false?
Copper (Cu) is row eleven, right in between Nickel (Ni) and Zinc. (Zn)
An element is a pure substance
What is true?
An element is a pure substance, meaning that it can't be broken down into different substances. Or, it's unmixed.
Define a compound element
What is consists of two or more types of element held together by covalent or ionic bonds?
A compound has to consist of two or more types of element held together by covalent or ionic bonds. Ionic bonding is a type of chemical bonding that involves the electrostatic attraction between oppositely charged ions. Covalent bonding involves the sharing of electron pairs between atoms.
The current model of the atom
What is the Electron Cloud Model?
In 1928 scientist developed the Electron Cloud Model, after discovering that electrons don't really travel in fixed orbits.
Define matter
What is anything that has mass and takes up space (has volume)?
Ancient philosophers who proposed the theory of matter include, Kanada, Leucippus, and Democritus.
Symbol for carbon
What is "C"?
Carbon (C) is row 14, right in between Boron (B) and Nitrogen. (N)
Elements have atoms in them
What is true?
Everything has atoms inside, and elements are no exception.
Examples of compound elements
What is water, (H2O) salt, (NaCl) and methane. (CH4)
To explain, water, for example, is a Hydrogen to every two oxygen atoms. Two different kind of atoms combined to form something new.
Atoms are uncutable
What is false?
In 1897 British scientist Joseph John Thompson discovered that atoms have smaller parts-making them, uncutable.
The three states of matter
What is liquid, solid, and gas?
Solid has the particles that are packed closest together, so it holds its shape. Liquid's particles are a little further apart so it fills the shape of whatever container its in. Gas has the furthest apart particles. It spreads anywhere and everywhere.
Number "1" on the periodic table
What is Hydrogen?
Hydrogen is "1" on the periodic table, on top, where, on the other side of the table, only Helium (He) is also at. It sits right on top of Lithium. (Li)
The name of the number that represents the number of protons in the nucleus
What is the atomic number?
The atomic number (the number of protons in the nucleus) is the defining property of an element. (How they tell all the atoms apart)
Five different atoms can be in one compound element
What is true?
In the rule of how to define compounds, it says, "two or more different kinds of atom" so any number over two is acceptable.
The basic parts of an atom
What is the nucleus, protons, neutrons, and electrons?
The nucleus is at the center of the atom, and contains most of the mass of the atom. It holds the protons and neutrons, protons having positive charge and neutrons having no charge. The electrons surround the nucleus, and they have negative charge.
Smoke is an example of...
What is gas?
Because smoke's particles are so far apart, it qualifies as gas. Also, you can put your hand through it without feeling it, like other gases.
Tennessine (Ts) is number "117"
What is true?
Tennessine (Ts) is number 117, in between Livermorium (Lv) and Oganesson. (Og)
Every element is made up of its own type of atom
What is true?
Every element's atoms are different. Carbon (C) has the same kind of atom as other Carbon, (C) but Helium (H) would have different kind of atom. There are no exceptions.
Helium can be considered a compound element
What is false?
Helium only contains Helium atoms, no different kinds, so it doesn't work as a compound.