Which of the first 20 elements in the periodic table are metal and which are nonmetals? What is the name of the Group 1 elements in the periodic table? What are the elements found in an A group (groups 1, 2, and 13-18) on the periodic table (also called representative elements)...
- (1,20) - (20,1) - (2,10) - (10,2) - (4,5) - (5,4) 4. Conclusion: The possible orders of the matrix with 20 elements are: - 1×20 - 20×1 - 2×10 - 10×2 - 4×5 - 5×4 Thus, there are a total of 6 possible orders for the matrix. Show More ...
阅读下面短文,从每题所给的 A、B、 C、D四个选项中选出可以填人空白处的最佳选项。What are the basic elements, or parts, of g
What are the basic elements (要素) of good manners? Certainly a strong sense of justice is one; courtesy (谦恭) is often 1 more than a highly developed sense of fair play. A friend of mine once told me about a time he was 2 along a narrow, unpaved (未铺柏油的) mountain road....
What are the basic elements(要素)of good manners? Certainly a strong sense of justice is one; courtesy(谦恭)is often1more than a highly developed sense of fair play.A friend of mine once told me about a time he was3along a narrow, unpaved(未铺柏油的)mountain road.3was another car that...
Since we know the matrix has 20 elements, we can write the equation:m×n=20 Step 3: Find the factor pairs of 20Next, we need to find all pairs of positive integers (m,n) that satisfy this equation. We can do this by finding the factors of 20. The factors of 20 are:1. 12. ...
How are the elements arranged in the modern periodic table? How are elements classified in the periodic table? What does each different element on the periodic table of elements represent? What do the elements in each column of the periodic table have in common?
细节题。根据第二段内容“Emotions are generally triggered by environmental events...However,internal processes,such as imagery,can also initiate emotional reactions.”可知情感是由外在和内在两大因素引起的。因此选项D是正确说法。 B、C两个选项只是产生情感的一个方面,不能完整概括情感产生的全部因素,故不是...
阅读下面短文,从短文后各题所给的 A、B、C和D四个选项中,选出可以填入空白处的最佳选项,并在答题纸上将该项涂黑。What are the basic elements
One common chemistry assignment is to name or even memorize the first 20 elements and their symbols. The elements are ordered in theperiodic tableaccording to increasingatomic number. This is also the number ofprotonsin each atom. These are the first 20 elements, listed in order: H - Hydrogen...