Why did chemists begin to organize known elements?
2 points
2
Question 2
2.
In the late 1700's, how many elements were known at the time.
2 points
2
Question 3
3.
Dmitri Mendeleev is accepted to which university?
2 points
2
Question 4
4.
By 1860, how many elements were known?
2 points
2
Question 5
5.
Early ways the elements were organized was by this property.
2 points
2
Question 6
6.
Group IA is also known as this set of metals.
2 points
2
Question 7
7.
Alkaline earth metals are know as Group _____.
2 points
2
Question 8
8.
According to early scientists patterns repeated every ________ number of elements.
2 points
2
Question 9
9.
In reality, elements repeat patterns every __________ number of elements.
2 points
2
Question 10
10.
Transition metals are.....
2 points
2
Question 11
11.
What does malleable mean?
2 points
2
Question 12
12.
How did John Newlands organize his elements?
2 points
2
Question 13
13.
According to table 6.1 and Lavoisier's table of simple substances, which of the following substances were considered Earths?
2 points
2
Question 14
14.
What group do the elements He, Ne, Ar, Kr, Xe and Rn belong?
2 points
2
Question 15
15.
Besides being obsessive with his periodic table, what concept helped him establish his periodic table?
2 points
2
Question 16
16.
What did Mendeleev deny existed, but is accepted by today's scientists?
2 points
2
Question 17
17.
Which element has been known for thousands of years.
2 points
2
Question 18
18.
Which scientist published a classification with the known elements as triads.
2 points
2
Question 19
19.
Which two elements did Mendeleev predict which were found in 1875 and 1886?
2 points
2
Question 20
20.
How is the modern periodic table organized?
2 points
2
Question 21
21.
What is another name for rows in the periodic table?
2 points
2
Question 22
22.
What is another name for the columns in the periodic table?
3 points
3
Question 23
23.
What are the three broad classes of elements in the periodic table?
2 points
2
Question 24
24.
Is this a row or a column?
2 points
2
Question 25
25.
The statement that there is a periodic repetition of chemical and physical properties of the elements when the are arranged by increasing atomic number is called the ___________________.